1 . China’s Tianwen 1 Mars probe (探测器) conducted its fourth orbital correction on Friday evening, as the spacecraft makes ready for its arrival in orbit around Feb. 10, according to the China National Space Administration.
The name comes from the long poem Tianwen, meaning Heavenly Questions or Questions to Heaven, written by Qu Yuan, one of the greatest poets of ancient China. In Tianwen, this name conveys the Chinese nation’s steady effort in pursuing truth and culture of exploring nature and the universe. CNSA also unveiled ( 发 布 ) the logo of China’s planetary exploration missions, featuring the letter C, signifying China, international cooperation and capacity of entering space.
Tianwen I has flown for 197 days and more than 465 million kilometers on its journey to the planet. It is now around 184 million km from Earth and I. 1 million km from Mars. Depending on the two planets’ orbits, Mars is between 55 and 400 million km from Earth. Mars probe Tianwen I is seen in its first selfies in space on Oct. 1, 2020. The administration also published a black-and-white picture of Mars taken by Tianwen I, the first snapshot (抓拍的照片) from the Chinese craft.
Tianwen I, the country’s first independent Mars mission, was launched by a Long March 5 heavy-lift carrier rocket on July 23 from the Wenchang Space Launch Center in Hainan province, kicking off the nation’s planetary exploration program.
A successful landing would make China only the second nation to place a spacecraft on the Martian planet. China would also be the first to successfully orbit, land and deploy ( 部署) a vehicle in the same mission. According to experts, searching for signs of life on Mars will be the first and foremost scientific goal. China is open and inclusive in the development of its space technology not least because it believes that the exploration of outer space should help build a community with a shared future for mankind.
1. Why is Qu Yuan’s poem mentioned in the text?| A．To tell the origin of space exploration. |
| B．To describe space exploration vividly. |
| C．To highlight the importance of space exploration. |
| D．To show Chinese continuous struggle in space exploration. |
| A．function | B．development | C．operation | D．structure |
| A．To build a common future for man. | B．To prove our achievement in space research. |
| C．To discover signs of life on this planet. | D．To expand the understanding of the space. |
| A．Letter C Logo symbolizes creation between countries. |
| B．China was the first nation to land a spacecraft on Mars. |
| C．Tianwen I made its fifth orbital correction around Feb. 10. |
| D．Tianwen I started a new chapter in Chinese planetary exploration. |
2 . Google has announced plans to stop supporting tools designed to follow Internet users across the web in order to target them with specific advertising.
Such tools are known as cookies-small data files that are stored on an Internet user's computer as they browse （浏览）different websites. This data can be read by web servers to identify web browsing behaviors of the user. Cookies make it possible for users to avoid having to repeatedly enter their user names and passwords to get access to websites they use often. But the use of cookies raises major privacy concerns, with critics saying a user's browsing history should not be recorded just to target them with ads.
Google announced in 2020 it had decided “to remove support for third-party cookies" from its Chrome browser. In another online announcement, Google repeated this promise, saying it will not build new tools to replace current cookie technology.
In explaining its decision, Google referred to a Pew Research study that found 72 percent of Americans feel that almost all of what they do online is tracked by advertisers. Google's decision to remove third-party cookies also followed increasing efforts to protect privacy in Europe and the United States. Google said the current Internet advertising model needs to change to answer “the growing concerns people have about their privacy and how their personal identity is being used.”
In January, however, Google's plan was questioned by British competition regulators. The country's Competition and Markets Authority announced it had launched an investigation into whether the changes would give Google an unfair advantage over competitors in Internet advertising. The agency said it received objections to the plan from Marketers for an Open Web, a league of technology and publishing companies. The group accuses Google of “abusing its dominant position” by attempting to create a new advertising model.
In its latest statement, Google said, “We will not build alternate identifiers to track individuals as they browse across the web, nor will we use them in our products.”
1. According to the text, what do you know about cookies?| A．Cookies are inconvenient for web users. |
| B．The users should repeat their passwords to enter websites. |
| C．Google uses Cookies to monitor the web users' private life. |
| D．The tracks of the web users can be followed by the web servers. |
| A．To use a alternative tool. |
| B．To get more personal information, |
| C．To respond to concerns about privacy. |
| D．To create a fair Internet advertising platform. |
| A．It was organized by an agency of the US. |
| B．All people don't accept the Google's plan. |
| C．Google has the biggest advantages on the Internet. |
| D．Marketers for an Open Web is in favor of the Google's plan. |
| A．Privacy should be protected. |
| B．Google will change advertising model. |
| C．There should not be many advertisements on the web. |
| D．Cookies will be removed from Google for privacy protection. |
3 . Do you continue to be healthy in social isolation? NASA is looking for people to spend 8 months locked in a Russian lab for a new experiment.
When humans go to the moon and travel to Mars, they will need to be prepared for long-term space travel and even longer stays on these far-off destinations. Currently, NASA's Artemis program aims to land humans on the moon for the first time since NASA's Apollo 17 mission landed in 1972.
While the moon is the main goal of NASA's Artemis program, the agency's larger goal is to send people to Mars. But long-term space travel and habitation won't be easy. Such missions will present both physical and mental challenges as astronauts work to not only survive, but perform important scientific research in uniquely difficult environments.
In the upcoming NASA-Russia experiment, a group of people will live in a closed facility at Russia's Institute for Biomedical Problems, which is in Moscow. This habitat facility was used in2011 for notable series of Russian mock (模拟的) Mars missions known as Mars 500. During these missions, groups of people spent 520 and 105 days on two separate missions in the facility.
The facility, according to the statement, will have "environmental factors similar to those astronauts are expected to experience on future missions to Mars". The group of people will spend 8 months living together in isolation and working on scientific research.
By living and working in this Mars-like environment, participants in this study will help NASA researchers better understand the psychological and physiological (心理和生理的) effects of isolation. These missions help researchers not only perform relevant science experiments but also see how people might get on under strange conditions for long periods of time.
So, if you're finding that living in social isolation works for you, you might be particularly well-suited for living in a Mars-like environment and this could be for you. But first, you have to qualify. NASA is looking for "highly motivated" Americans between the ages of 30-55, who must speak both Russian and English fluently and have a Master of Science, Doctor of Philosophy, Doctor of Medicine, or military officer training. Applicants with other related experience may also be considered. Those who are chosen to be a part of this group will be paid for their work.
1. What do we know about the new experiment?| A．It will find the best way for humans to live on Mars. |
| B．It is the first of its kind to be carried out since 1972. |
| C．It is prepared for NASA's human spaceflight program. |
| D．It will decide the people to be sent to the moon by NASA. |
| A．To explain why the facility has been chosen. |
| B．To compare the similarities among related missions. |
| C．To show Russia's achievement in space exploration. |
| D．To indicate the new experiment will have great success. |
| A．The process of the experiment. | B．The purposes of the experiment. |
| C．The popularity of the experiment. | D．The preparations for the experiment. |
| A．Artemis: NASA's new program | B．Love isolation? NASA wants you! |
| C．NASA's Mars exploration program | D．Want to have a trip to Mars? Come! |
4 . Could looking through trees be the view to a greener future? Trees replacing the clear glass in your windows is not a work of science fiction. It's happening now.
Forest Products Laboratory researcher Junyong Zhu together with colleagues from the University of Maryland and University of Colorado has developed a transparent wood material that may be the window of tomorrow. Researchers found that transparent wood has the potential to outperform glass currently used in construction in nearly every way.
While glass is the most common material used in window construction, it comes with quite a few bad consequences. Heat easily transfers through glass and amounts to higher energy bills when it escapes during cold weather and pours in when it's warm. Glass production used for construction also comes with a heavy carbon footprint. Manufacturing emissions alone are approximately 25,000 metric tons per year, without considering the heavy footprint of transporting the glass.
The innovation was developed using wood from the balsa tree, which is native to South and Central America. The team treated balsa wood to an oxidizing bath, where the wood is kept in a bleach solution at room temperature to remove the light-absorbing substance from the structure. The wood is then penetrated （注入）with a synthetic polymer called polyvinyl alcohol （PVA）, creating a product that is virtually transparent. So the transparent wood is created, which is far more durable and lighter than glass.
Switching to transparent wood could prove to be cost efficient as well. It is approximately five times more thermally efficient than glass, cutting energy costs. It is made from a sustainable, renewable resource with low carbon emissions.
With all of these potential benefits for consumers, manufacturing and the environment, the case for transparent wood couldn't be clearer.
1. What is the main problem with glass used in window construction?| A．It is inefficient in letting heat out. |
| B．It is inconvenient to transport. |
| C．It causes a high ecological price. |
| D．It scarcely reflects light and heat. |
| A．A way to make colors fade. | B．A liquid to make objects pale. |
| C．A container to store liquids. | D．A process to solve problems. |
| A．Innovation is the vitality of scientific housing. |
| B．Things are not always what they seem. |
| C．There are more ways to the wood than one. |
| D．There is nothing permanent except change. |
| A．Skeptical. | B．Ambiguous. | C．Appreciative. | D．Conservative. |
5 . Earthquake rescue robots have experienced their final tests in Beijing. Their designers say with these robots, rescuers will be able to save lives during an earthquake. This robot looking like a helicopter, is called the detector-bot. It’s about 4 meters long, and it took about 4 years to develop the model. Its main functions (作用) are to collect information from the air, and send goods of up to 30 kilos, to people trapped by an earthquake.
This robot has a high definition 360 degree panoramic (全景) camera. It can work day and night and will also be able to send the latest pictures from the quake area.
Dr. Qi Juntong, Chinese Academy of Science, said, “The most important feature of this robot is that it doesn’t need a distant control. We just set the destination (目的地) information on it, and then it takes off, and lands by itself. It flies as high as 3,000 meters, and as fast as 100 kilometers per hour.”
This robot has a different function — it can change as the environment changes. Its main job is to search for any signs of life in places where human rescuers are unable to go.
As well as a detector (探测器) that finds victims and detects poisonous gas, a camera is placed in the 40 centimeter long robot, which can work in the dark.
Another use for the rescuers is the supply part, with its 10 meter long pipe. People who are trapped in the ruins, will be able to get supplies including oxygen and liquids.
Experts have said that the robots will enter production, and serve as part of the national earth-quake rescue team as soon as next year.
1. According to the passage, this robot________.| A．is carried by the helicopter | B．weighs about 30 kilos |
| C．is a machine with a length of 10 meters | D．hasn’t been put into production so far |
| A．a camera | B．a robot | C．a rescuer | D．a detector |
| A．It is designed to prevent the earthquake. | B．It is unable to send goods. |
| C．It can take and send pictures even in the dark. | D．It can be used to take in poisonous gas. |
| A．what the robot looks like | B．an introduction to the robot |
| C．how the robot is made | D．information about earthquakes |
6 . Plants, and the insects which rely on them, are the living foundations of our planet. But these foundations are under stress because we have a tendency to replace fields and forests with decorative trees and shrubs imported from around the world. Adding to the problem, our obsession (痴迷) with perfection leads us to use a lot of pesticides (杀虫剂).
These actions are part of the reason global biodiversity is crashing. There are over three billion fewer wild birds in North America than there were in 1970. Recent research shows that insect numbers, even in nature reserves, have fallen, and 40 percent of all insect species may be extinct within a few decades. This is discouraging news; however, there are actions we can take to help bring at least some species back.
The first step is to redefine our concept of “garden” to include more than just plants. We need to intentionally share our space, and not just with the birds, bees and butterflies that visit our flowers, but also with the little insects that may eat a part (very rarely all) of our plants. Therefore, we must limit pesticide use. It’s crucial to support nature’s recovery, and it’s much better for everyone: no doctor has ever recommended long-term exposure to pesticides.
Many drought-tolerant plants brought in from across the planet are being passed off as ecofriendly. However, mostly they’re not. Yes, you’re saving water, but these foreign plants can become disasters when they escape our yards. Helping the environment can be about more than saving water. Even in drier areas, like the American West, the selection of attractive native plants to choose from is vast. If dry is your style, there are native wildflowers, flowering bushes and trees that allow you to save water and nature.
Xeriscapes (节水型园艺) leave many gardeners thirsting for green, and there’s an important alternative that has been largely ignored. For those disenchanted with dry landscaping, using underappreciated and water-loving native plants to make your garden a real-life oasis (绿洲) could be lifesaving to wildlife. In nature, this unsung group of native plants is limited to riparian zones, the narrow belts of green along water bodies, but if consumers demand them, nurseries will increasingly carry these riparian species, and the presence of such plants in the garden will provide for many animals including not just butterflies and their relatives but also colorful birds.
The ideal garden would offer a combination of drought-tolerant native plants and a few species that need a little more water, providing options for little guests and the bigger ones that will come to eat them. As more creatures stop by to share our yards, we will be making nature, and us all, a little healthier.
1. What do we know about insect species?| A．They have an impact on the diversity of plants. |
| B．They disappear because of lack of nature reserves. |
| C．They decrease partly due to our pursuit for perfection. |
| D．They are the reason why we replace fields and forests. |
| A．sick of | B．addicted to |
| C．concerned about | D．impatient with |
| A．why we need grow native plants in gardens |
| B．how gardening helps with biodiversity |
| C．whether we should redefine “garden” |
| D．what benefits gardening brings |
CP: Central Point P: Point Sp: Sub-point C: Conclusion
A． | B． |
C． | D． |
7 . Humans’ overconsumption of resources is a leading contributor to global climate change, says University of Arizona researcher Sabrina Helm. Therefore, it’s increasingly important to understand the choices consumers make and how those decisions affect the health of a planet with limited resources. In a new study, published in the journal Young Consumers, Helm and her colleagues explore how materialistic values influence pro-environmental behaviors in millennials, who are now the nation’s most influential group of consumers.
The researchers focused on two main categories of pro-environmental behaviors: reduced consumption, which includes actions like repairing instead of replacing older items; and “green buying,” or purchasing products designed to limit environmental impacts. The researchers also looked at how engaging in pro-environmental behaviors affects consumer well-being.
More materialistic participants, the researchers found, were unlikely to engage in reduced consumption. However, materialism did not seem to have an effect on their likelihood of practicing “green buying.” That’s probably because “green buying,” unlike reduced consumption, still offers a way for materialists to fulfill their desire to get new items, Helm said.
Study participants who reported having fewer materialistic values were much more likely to engage in reduced consumption. Consuming less was, in turn, linked to higher personal well-being and lower psychological suffering. Green buying—which may have some positive environmental effects, although to a smaller degree than reduced consumption—was not found to improve consumer well-being, Helm said.
The take-home message for consumers: “The key is to reduce consumption and not just buy green stuff. Having less and buying less can actually make us more satisfied and happier,” Helm said. “If you have a lot of stuff, you have a lot on your mind,” she said. “For example, it requires maintenance and there’s a lot of burdens of ownership, and if you relieve yourself of that burden of ownership, most people report feeling a lot better and freer.”
Helm and her colleagues additionally looked at how materialism affects millennial consumers’ proactive financial behaviors, such as budgeting and saving. Examining financial behaviors alongside pro-environmental behaviors provides a picture of how young adults proactively deal with resource limitations in two contexts: environmental and financial, Helm said.
As expected, Helm and her colleagues found that those who reported having more materialistic values engaged in fewer proactive financial behaviors than their less materialistic counterparts (对应的人). The researchers also found that, consistent with previous studies, proactive financial behaviors were associated with better personal well-being, life satisfaction and financial satisfaction, as well as lower psychological suffering.
Understanding how materialistic values impact consumer behaviors, and how those behaviors in turn affect personal and environmental well-being, is important, Helm said. However, she acknowledges that for many consumers, shifting behaviors to be more financially proactive and consume less will be challenging.
1. What do we know about pro-environmental behaviors?| A．They are a cause of climate change. |
| B．They lead to a more satisfying life. |
| C．They vary in different age groups. |
| D．They are affected by materialism. |
| A．ownership of green products brings a sense of happiness |
| B．materialists prefer practicing green buying to buying less |
| C．green buying helps control people’s desire to buy new items |
| D．buying less and green buying have similar effects on people |
| A．Replacing older items. | B．Developing new resources. |
| C．Buying greener products. | D．Being careful with expenses. |
| A．When people develop proactive financial behaviors. |
| B．Which financial behaviors lead to mental well-being. |
| C．Why it is hard to change people’s financial behaviors. |
| D．How materialistic values influence financial behaviors. |
8 . Immersive Van Gogh
From the creators of the blockbuster show in Paris seen by over two million visitors and still wowing crowds in Toronto, the west coast premiere (首场) of the Immersive Van Gogh Exhibit will bring the art of Vincent to life in Los Angeles.
Immersive art is not just a technical way to represent video and audio in huge spaces. The word immersive indicates a deep commitment of intentions which connect images and sounds in a way that the audience is able to experience a different way of the art.
True to its name, this exhibition transforms the iconic (偶像的) paintings of Vincent van Gogh into moving, wall-filling projections. “Immersive Van Gogh” promises half-a-million cubic feet of projections that pull from some of the post-impressionist’s most recognizable pieces, including The Bedroom, Sunflowers and, yes, The Starry Night.
You will experience art like never before—lose yourself in entrancing, moving images that highlight brushstrokes, detail, and color—truly illuminating (照亮) the mind of the genius.
LOCATION
The Immersive Van Gogh Exhibit is located at a secret place situated in the heart of Los Angeles. To be announced before the exhibit opens, existing ticket holders will receive an email with the place name and location once it is made public.
TICKET PRICES
| VIP TICKETS—$99.99 ●Priority access ●Van Gogh cushion (a gift for you) ●Limited edition poster | PREMIUM TICKETS—$59.99 ●Van Gogh cushion (rental) ●Limited edition poster |
| BASIC TICKETS—$54.99 ●Admission only | CHILD TICKETS—$29.99 ●Ages 6—16 (children 5 and under do not require a ticket) ●Admission only ●Child tickets are not subject to change of date fees |
Tickets are available online at www.vangoghla.com.
GIFT SHOP
Stop by our Exhibit Gift Shop to take the magic of Van Gogh home with you! From clothing and jewelry to home décor, children’s books, and so much more, you will find unique and thoughtful souvenirs at the Immersive Van Gogh Exhibit. Also be sure to check out at our online store!
Experience the organic landscapes of Van Gogh’s imagination, and journey through his brilliance and madness in a completely new and unforgettable way.
1. According to the passage, the Immersive Van Gogh Exhibit ________.| A．presents Van Gogh’s art in a modern way |
| B．begins a journey to Van Gogh’s hometown |
| C．displays Van Gogh’s paintings on moving walls |
| D．designs projects on Van Gogh’s learning experience |
| A．An email. | B．A website. |
| C．The ticket office. | D．The gift shop. |
| A．$109.98. | B．$154.98. |
| C．$159.98. | D．$199.98. |
9 . Blood-Doping Champion
Blood doping (违规输血) to improve performance is forbidden in professional sports. Athletes can use this technique to fuel their muscles with more oxygen-carrying red blood cells—for example, by receiving a transfusion. But many animals dope naturally: sheep, fishes and horses can boost their blood’s capacity to carry oxygen by 16 to 74 percent in physically demanding situations. Now a study shows that an Antarctic fish called the bald notothen can increase its carrying capacity by more than 200 percent to pursue an active life in cold waters.
Like most fishes native to Antarctica, the bald notothen’s blood contains anti-freeze proteins that help it withstand extreme cold. But these proteins, along with red blood cells (RBCs), can make blood sticky and hard to circulate. Some Antarctic fishes adapt by removing RBCs altogether, absorbing oxygen directly from the water via skin as they passively await prey (猎物). Bald notothens, however, actively swim below surface ice to chase other active life when avoiding seals and penguins. For this behavior, “you need to supply more oxygen to the muscles,” says Michael Axelsson, a physiologist at the University of Gothenburg in Sweden and co-author of the new study.
The scientists compared RBC levels in samples collected from bald notothens relaxing in glass tanks with those in samples drawn from fish they “chased” using a plastic tube. RBC levels were at 9 percent in the resting animals but 27 percent in the exercised ones, showing a 207 percent increase in the latter’s blood oxygen carrying capacity. “No other fish we’ve seen can more than double their RBCs or drop their numbers to such a low level when resting,” Axelsson says. The fish’s spleen (脾) stores RBCs, and the researcher found that to release more into the bloodstream, the organ shrinks to weigh 41 percent less.
The enormous changes in RBC levels initially surprised Gerald Kooyman, a biologist at the Scripps Institution of Oceanography, who was not involved in the study. He notes, however, that these animals have fewer blood cells to begin with, so maintaining circulation with a tripled RBC count is less difficult. If a diving Weddell seal pushed its RBC levels from 40 to 90 percent, for instance, its blood would be dangerously hard to pump.
Yet bald notothens do face trade-offs for their ability. The scientists found blood pressure was 12 percent higher and the heart worked 30 percent harder in active individuals. Bald notothens can rest during quiet times, but when they need to use their abilities, Axelsson says, “these fish have to live with more RBCs because they need more oxygen.”
1. Compared with most fishes native to Antarctica, what is special about the bald notothen?| A．Its blood contains anti-freeze proteins. |
| B．It can absorb oxygen directly from water via is skin. |
| C．Its red blood cells can make blood sticky and hard to circulate. |
| D．It actively swims below surface ice when chasing other active life. |
| A．RBC levels. | B．Scientists. |
| C．Glass tanks. | D．Fishes. |
| A．the RBC levels in seals can increase from 40 to 90 percent |
| B．bald notothens’ blood pressure are 12 percent higher than other fishes |
| C．when bald notothens chase active life, there are more RBCs in their bodies |
| D．Gerald Kooyman, a marine biologist provided some suggestions on this study |
| A．To explain study methods on fishes. |
| B．To introduce some findings about a fish. |
| C．To present a way to improve athletes’ performance. |
| D．To raise people’s awareness to protect bald notothens. |
10 . Round and Round They Go
Space is becoming more crowded. On December 3, a Falcon 9 rocket made by Space X thundered into the sky. On board were 64 small satellites, more than any American company had launched before in one go. They have a variety of uses, from space-based- radar to the monitoring of radio-frequency- emissions.
These objects are part of the latest breed of low-Earth-orbit (LEO) satellites. This launch is just taste of what is planned. Space X and One Web, a communications firm, plan to launch satellites in their thousands, not hundreds. The pair are set to double the total number of satellites in orbit by 2027.
That promises to change things dramatically on Earth. LEO satellites can bring internet connectivity to places where it is still unavailable or unaffordable. This will also be a lasting source of new demand for the space economy. Morgan Stanley, a bank, projects that the space industry will grow from $350 billion in 2016 to more than $1. I trillion by 2040. New internet satellites will account for a half this increase.
For that to happen, however, three worries must be overcome. Debris(碎片)is the most familiar concern. As long ago as 1978, Donald Kessler, a scientist at NASA, proposed situation in which, when enough satellites were packed into low-Earth orbits, any collision could cause a chain reaction which would eventually destroy all space craft in its orbital plane(平面). The syndrome which bears Mr. Kessler's name weighs heavily on the minds of executives at the new satellite firms. Debris could cause entire tracts(广阔的一片) of space to be unusable for decades.
Solutions exist. One is to grab malfunction satellites and pull them down into Earth's atmosphere. Another is to monitor space more intensively for debris; a US Air Force program me called Space Fence is due to start in 2019. But technology is only part of the answer. Rules are needed to govern the safe disposal(清除) of old satellites from low-Earth orbit. The United States' Federal Communications Commission is revising its regulations with this in mind. Other countries should follow suit.
Cyber-security is a second, long-standing worry. Hackers could take control of a satellite and seal intellectual property, redirect data flows or cause a collision. The satellite industry has been slow to respond to such concerns. But as more of the world's population comes to rely on the infrastructure of space for access to the internet, the need for action intensifies.
The third issue follows from the first two. If a simple mistake or a cyber-attack can cause a chain reaction which wipes out hundreds of billions of dollars of investment, who is liable? Underwriters(保险商) are studying the plans of firms that wish to operate large numbers of satellites. But there is a long way to go before the risks are well understood, let alone priced.
As space becomes more commercialized mind-bending prospects open up: packages moved across the planet in minutes by rocket rather than by plane, equipment sent to other small planets, passengers launched into orbit and beyond. All that and more may come, one day. But such activities would raise the same questions as LEO satellites do. They must be answered before the space economy can truly develop.
1. What can we learn about LEO satellites from the passage?| A．They are supposed to limit the space economy. |
| B．They are expected to increase in large numbers. |
| C．They are designed to move beyond the Earth as far as possible. |
| D．They are mainly intended to bring internet connectivity to remote areas. |
| A．depending entirely on the modern technology |
| B．monitoring the movement of spaceships carefully |
| C．strengthening rules to remove old satellites safely |
| D．destroying all the satellites with problems instantly |
| A．Measure. | B．Increase. | C．Spread. | D．Repeat. |
| A．Lack of satellite regulations. |
| B．Loss of intellectual property. |
| C．Crisis of confidence in the field. |
| D．Slow response of satellite industry. |
| A．It should be further confirmed for its ownership. |
| B．It should be continued because of its advantages. |
| C．It should be done carefully to avoid potential risks. |
| D．It should be stopped in face of the space economy. |
