2 . We have all experienced the force of gravity. It is what happens to you when you jump up into the air. Disappointingly, we tend to fall right back down to the ground. But what if we could switch gravity off? What will happen if the gravity vanishes?
Buckey, an astronomer, says that our bodies are adapted to an Earth-like gravitational environment. If we spend time living where gravity is different, such as on board a space station, our bodies change.
It is now an established fact that astronauts lose bone mass and muscle strength in space, and their sense of balance changes due to the absence of gravity. There are also other problems. For reasons not entirely clear, their red blood cell count falls. Wounds take longer to heal and the immune system loses its strength. Even sleep is disturbed if gravity is weak or absent.
That is just what happens after a short visit to space. “What if you were to grow up without gravity?” Buckey asks. “What about the systems that depend on gravity like your muscles, or your balance system, or your heart and blood vessels?” There is good reason to believe the human body would develop differently.
Karen Masters has explored the immediate physical consequences of losing gravity. The first problem is that Earth is rotating at high speed. Earth’s atmosphere and its oceans, rivers and lakes would be one of the first things to drift away into space. A lack of gravity would eventually destroy our very planet, writes Masters. “Earth itself would most likely break apart into pieces and float off into space.”
A similar fate would happen to the Sun. Without the force of gravity to hold it together, the intense pressures at its core would cause it to burst open in an explosion. The same thing would happen to all the other stars in the Universe. However, because they are so far away, it would be years before the light from their death reached you.
1. What effects will the lack of gravity have on astronauts?| A．Their sense of balance will lose. | B．Their immune system won’t work. |
| C．Their wound will no longer heal. | D．Their red blood cell count will decrease. |
| A．Human body on Earth will develop differently. |
| B．Earth will rotate at its highest speed. |
| C．Atmosphere and water on Earth will travel away into space. |
| D．Earth will break down into pieces and float off into space. |
| A．It will hold the Universe together. |
| B．The pressure of its core may lead to its burst. |
| C．The light from its death will reach Earth quickly. |
| D．Its core will drift away into space. |
| A．In a science magazine. |
| B．In a guidebook. |
| C．In a short story. |
| D．In an environment report. |
The Chinese government has worked with space authorities in Russia, the United States and the European Union to advance international cooperation in the applications for its Beidou system,
He Mu, general manager of Aerospace Great Wall Satellite Navigation Technology, said that his company is
Foreign Ministry spokesman Wang Wenbin said at a news conference on Friday in Beijing that Beidou
China is willing
内容包含:
1. 人物介绍(如职业、性格、外貌等，至少要有两个要点) ;
2. 敬佩他/她的原因(讲述他/她具体做了哪些事情) ;
3. 他/她对你的影响。
作文要求:
1. 字迹工整, 语句连贯, 意思连贯；
2. 不得在作文中出现学生的真实姓名和所在学校;
3. 词数 100 字左右。
The person I respect
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5 . When parents talk about school safety these days, they’re usually referring to the increase in violence at schools. But research shows that school-age children are actually nine times more likely to suffer an injury while doing sports than to be the victim of violence while at school. Accidents can be prevented if parents are on the lookout for potential dangers. To help you keep your kids free from harm, here are some safety tips:
● Teach your child never to talk to strangers or accept rides or gifts from strangers. Remember, a stranger is anyone you or your child doesn’t know well or trust.
●Be sure that your child walks to and from school with a sibling, friend or neighbor.
●Teach your kid, whether walking, biking or riding a bus to school, to obey all traffic signals, signs and traffic officers. Remind him to be extra careful in bad weather.
●When driving your kid, deliver and pick them up as close to the school as possible. Don’t leave until they are in the schoolyard or building.
● If your child rides a bike to school, make sure he wears a standard helmet. Research shows that a helmet can reduce the risk of head injury by 85%.
●Teach your kid to arrive at the bus stop earlier, stay off the street, and wait for the bus to come to a complete stop.
● Be sure that your kid knows his or her home phone number and address, your work number, the number of another trusted adult and how to call 911 for emergencies.
1. Which of the following word has the same meaning as the underlined word “sibling”?| A．brother or sister | B．neighbor | C．friend | D．stranger |
| A．Kids should be taught never to talk to strangers. |
| B．Kids should obey the traffic rules. |
| C．Kids should be taught to call 911 for anything. |
| D．Kids should stay off the street while waiting for the bus. |
| A．talk about school safety | B．call on readers to fight against school violence |
| C．discuss the injuries at school | D．give advice on school-age children’s safety |
When it comes to intangible cultural heritage, China currently has 38 items on the UNESCO list.
To make it on the list, a candidate must have deep cultural and social meaning, UNESCO said. This is something Chinese cuisine is rich
Many important dates in China
Apart from its
In addition to health
Although each plate of Chinese food contains years of ancestral wisdom, sometimes it's beyond a
Now, the association is working on an
7 . When the world responded to the COVID-19 epidemic with broad lockdown orders, home delivery services lacked the manpower to keep up with the explosion in demand. Stores and companies went on doing the hiring; in some areas, it was very hard to get goods delivered.
You know what might have made things a bit easier? Drones. It has taken years for the Federal Aviation Administration (FAA) to allow the use of unmanned aerial devices for commercial delivery. Over the course of a decade, we've gone from a complete ban to slow, heavily regulated, and restricted initial testing.
At the end of August 2020, the FAA finally gave Amazon approval for its Prime Air drone delivery fleet. It did that by classifying Amazon as an "air carrier" and making it obey some relatively recent regulations intended to facilitate drone deliveries.
The FAA's rules initially required that private drones remain in sight of the operator at all times. That simply won't work for delivery services. So in 2019, the agency introduced a special certification process that would allow approved pilots to operate drones across much longer distances.
Amazon will now be able to join Google in drone deliveries. The company revealed that its fleet can carry packages weighing up to 5 pounds and deliver them within a 15-mile range in less than 30 minutes. The FAA also recently granted the company Zipline, a temporary waiver allowing it to deliver medical supplies in North Carolina. Zipline had been operating for some time in Africa. But the United States continues to fall behind both developed and developing nations in giving drone companies the freedom to test their services.
While Amazon still faces several technical problems and strict regulations, it's great that the government is giving it this new room to move. Too bad it took the feds this long to allow it, especially as the pandemic made drone deliveries not just an innovation, but something we could have used yesterday.
1. What can be inferred from Paragraph 2?| A．Drones are the most convenient aerial devices. |
| B．The use of drones was completely banned at first. |
| C．It took a short time to allow the use of drones. |
| D．FAA allows drones to serve for the army. |
| A．Home delivery services were in great demand because of the COVID-19 epidemic. |
| B．Rules for private drones also works for delivery services. |
| C．Amazon's pilots were allowed to operate drones across much longer distances until 2020. |
| D．America took the lead in giving drone companies the freedom to test their services. |
| A．The companies allowed to use drone delivery. | B．Amazon joining in drone deliveries. |
| C．Drone deliveries used in medical service. | D．Zipline operating in Africa and America. |
| A．Neutral. | B．Negative. | C．Favorable. | D．Indifferent. |
“An apple a day keeps the doctor away”.
But why is water important? The human body needs water
9 . The problem of global warming has caused a lot of people to get started on increasing their battles to save the Earth's ecological system. The trouble is that nearly all people think it even expensive to begin living green. Continue reading to see several immediate things you can do to get on the road to living green.
You can get on a great start by learning to recycle. While this appears really simple, there are many people who still throw glass bottles and aluminum（铝）cans into their common garbage. In the US, it's easy to locate a trash service that has glass and aluminum recycling alternatives. If you take a few seconds to wash the cans and bottles and put them in the recycle bin, you will be on the path to saving the Earth.
One more big waste product is newspapers. Majority of people will merely take their newspaper and throw it in the garbage when they finish reading it. Still there are many other things you can do with an old newspaper when you finish reading it. For instance, newspapers make terrific material for cleaning windowpanes. You can clean your windows with newspapers rather than paper towels and window cleaner for a streak-free shine.
What else you can do to get started living green is to start walking a bit more. Many people think nothing of getting in their car and driving one block to get soda at the local convenience store. If you merely walk to the store, not only could it take less time, because you won't have to try to find a parking place, but you will be saving money on petrol and helping to save the planet by not burning those fuels. If you wish to save even more on fuel, take the chance to join the car pool whenever you can and just mow your lawn twice a month instead of weekly.
1. What is the main purpose of Paragraph 1?| A．To tell us that many people are living green. |
| B．To express worries about global warming. |
| C．To call on people to live an easy life. |
| D．To advise people to learn how to live green. |
| A．many people can't recycle glass bottles properly |
| B．cans and bottles are usually washed before recycled |
| C．it is rather difficult to recycle cans and bottles |
| D．people would like to throw the wastes everywhere |
| A．a pool where cars can park |
| B．a good way to avoid traffic jams |
| C．a group of people sharing the same car |
| D．an organization to protect the environment |
| A．It may cost us much more to live a green life. |
| B．Going green is much simpler than people think. |
| C．A lot of things can be reused in our life. |
| D．People are living a much better life than before. |
10 . How to Improve Your Reading Comprehension
Are you trying to read a book and have no idea when a character appeared and became the most important character in the book?
Keep Notes
Find any type of paper to keep notes in. Get as many pieces of paper as you think you’ll need for the story. Try writing down characters and their relationships.
Let Information Guide You
If you are reading a textbook, use the organization of it to guide you. You should pay attention to the following: The syllabus(大纲)or class outline. The homework assignment. What the instructor emphasizes in class. Any available sample tests or quizzes.
Read books over again
Reading teachers talk about fluency(流利).
To be fluent, you want to be able to read 90 words a minute. That seems like a lot, but with only a little bit of practice, you should be able to get there.
Whether that helper is a teacher, a friend, or a parent, read with someone above your level who you're comfortable with talking to and asking questions.
| A．Read with a helper. |
| B．What kind of practice? |
| C．Draw a family tree, if it helps. |
| D．Become better at identifying words. |
| E．It is the ability to read words at a certain speed. |
| F．Have a dictionary or a computer with you while reading. |
| G．Read this article to help improve your reading comprehension. |
