1 . When a computer works on a group of programs, it can get very hot. Cooling the computer can cost a lot. So some scientists wonder what would happen if the heat from the computer could be used.
Large Internet companies such as Google and Microsoft have thousands of computers. As these computers deal with information, they produce lots of heat, so they need huge cooling systems. These systems send the heat into the air.
A computer in Holland thinks paying to make the computer work and then paying again to cool them are a waste of energy. So the company developed a special device — the e-Radiator.
Boaz Leupe, head of the company, says that e-Radiator works as a heating system and saves money. He explains that the energy is used twice — once to heat the home and once to cool the computer and that the users don’t have to pay to cool their computers.
Five homeowners in Holland are testing the heating system in their homes.
“We pay for the computer using. so, in that way, homeowners get heating for free,” Boaz says. Jan Visser is one of the homeowners. “If you use the computer more, the e-Radiator produces more heat,” he says, “It cannot provide enough heat if you don’t use your computer often.” But he is ready to try it, It’s a great help for his family.
The company says e-Radiators produce heat temperatures of up to 55℃. It says the system could save its users about $440 a year.
1. Before the e-Radiator appears, usually the heat of a computer ________.| A．is sent into the air | B．helps the five homeowners |
| C．is used twice | D．makes the computer work better |
| A．to drive the computer | B．to help Microsoft |
| C．to heat the computer | D．to provide heat |
| A．节能 | B．实验 | C．仪器 | D．开关 |
| A．An Environment Problem | B．A New Way to Heat Homes |
| C．The Future Computers | D．The Energy to Be Wasted |
2 . Brownie and Spotty were neighbor dogs who met every day to play together. Like pairs of dogs you can find in any neighborhood, these two loved each other and played together so often that they had worn a path through the grass of the field between their houses.
One evening, Brownie’s family noticed that Brownie hadn’t returned home. They went looking for him with no success. Brownie didn’t show up the next day, and, although they made their efforts to find him, by the next week he was still missing, Curiously, Spotty showed up at Brownie’s house alone, barking and jumping. Busy with their own lives, they paid no attention to the nervous little neighbor dog.
Finally, one morning Spotty refused to take “no” for an answer. Ted, Brownie’s owner, was continuously disturbed by the angry, determined little dog. Spotty followed Ted about, barking all the time, then darting toward a nearby empty lot and back, as if to say, “Follow me! It’s urgent!”
Eventually, Ted followed Spotty across the empty lot as Spotty stopped to race back and barked encouragingly. The little dog led the man to a deserted spot a half mile from the house. There Ted found his beloved Brownie alive, one of his legs crushed in a steel trap (圈套). Frightened, Ted now wished he had taken Spotty’s earlier appeals seriously.
Then Ted noticed something. Spotty had done something else besides leading Brownie’s human owner to his trapped friend. In a circle around the injured dog, Ted found some food remains of every meal. Brownie had been fed that week! Spotty had been visiting Brownie regularly, in the hope of keeping his friend alive. Spotty had actually stayed with Brownie to protect him from hunger and other dangers, and keep his spirits up.
Brownie’s leg was carefully treated and he soon got well again. For many years thereafter the two families watched the faithful friends chasing each other down that well-worn path between their houses.
1. At the very beginning, Ted paid little attention to Spotty because __________.| A．he was not free at the moment | B．he was sure Brownie would be OK |
| C．he didn’t like Spotty at all | D．his missing dog made him sad |
| A．rushing | B．shouting | C．walking | D．looking |
| A．managed to free his dog at once | B．was very thankful to Spotty |
| C．regretted not following Spotty earlier | D．was angry with the trap-maker |
| A．humans and animals depend on each other for comfort |
| B．it’s not right to hunt for animals in any neighborhood |
| C．Ted has to take better care of his beloved dog later on |
| D．Brownie would have died without Spotty’s timely help |
3 . Chinese high school students have the most positive attitude towards online learning compared with those in the United States, Japan and the Republic of Korea (ROK), according to a report released by China Youth Daily.
The study, conducted by researchers at China Youth and Children Research Center, including their counterparts in the other three countries, covered 3,903 Chinese high school students, 1,521 US high school students, 2,204 Japanese high school students and 1,618 high school students of the ROK.
The report showed that most of the surveyed students in the four countries embrace online learning.
Online learning is important" is perceived by 87.1 percent of Chinese students, and "on-learning is interesting" is supported by 91.2 percent of Chinese students, both a little higher than that in any of the other three countries.
More than 94 percent of Chinese high school students believe that online learning can expend scope of knowledge, while 86.8 percent believe that they can learn from first-class teachers via the Internet, according to the report.
Through online learning can push the boundaries of time and space, the report said the students were easily distracted, adding that students in the four countries expressed similar concern such as poor vision, reliance on the Internet and less effort in problem-solving on their own.
1. What do most Chinese students think of online learning?| A．It is of great importance. |
| B．It is helpful but kind of boring. |
| C．It helps them stay focused at home. |
| D．It is less interesting than classroom learning. |
| A．Schedule. | B．Accept. | C．Abandon. | D．Update. |
| A．It makes students feel at school. |
| B．Students can attend classes given by excellent teachers. |
| C．Students will work harder when they are learning online. |
| D．It enables students to know more about their classmates. |
| A．China Daily did the study. |
| B．American students dislike online learning. |
| C．Students in the world enjoy online learning. |
| D．Online learning may lead to students' bad eyesight. |
4 . For those who can stomach it, working out before breakfast may be more beneficial for health than eating first, according to a study of meal timing and physical activity.
Athletes and scientists have long known that meal timing affects performance. However, far less has been known about how meal timing and exercise might affect general health.
To find out, British scientists conducted a study. They first found 10 overweight and inactive but otherwise healthy young men, whose lifestyles are, for better and worse, representative of those of most of us. They tested the men’s fitness and resting metabolic (新陈代谢的) rates and took samples (样品) of their blood and fat tissue.
Then, on two separate morning visits to the scientists’ lab, each man walked for an hour at an average speed that, in theory, should allow his body to rely mainly on fat for fuel. Before one of these workouts, the men skipped breakfast, meaning that they exercised on a completely empty stomach after a long overnight fast (禁食). On the other occasion, they ate a rich morning meal about two hours before they started walking.
Just before and an hour after each workout, the scientists took additional samples of the men’s blood and fat tissue.
Then they compared the samples. There were considerable differences. Most obviously, the men displayed lower blood sugar levels at the start of their workouts when they had skipped breakfast than when they had eaten. As a result, they burned more fat during walks on an empty stomach than when they had eaten first. On the other hand, they burned slightly more calories (卡路里), on average, during the workout after breakfast than after fasting.
But it was the effects deep within the fat cells that may have been the most significant, the researchers found. Multiple genes behaved differently, depending on whether someone had eaten or not before walking. Many of these genes produce proteins (蛋白质) that can improve blood sugar regulation and insulin (胰岛素) levels throughout the body and so are associated with improved metabolic health. These genes were much more active when the men had fasted before exercise than when they had breakfasted.
The implication of these results is that to gain the greatest health benefits from exercise, it may be wise to skip eating first.
1. The underlined expression “stomach it” in Paragraph 1 most probably means “______”.| A．digest the meal easily | B．manage without breakfast |
| C．decide wisely what to eat | D．eat whatever is offered |
| A．Their lifestyles were typical of ordinary people. |
| B．Their lack of exercise led to overweight. |
| C．They could walk at an average speed. |
| D．They had slow metabolic rates. |
| A．They successfully lost weight. | B．They consumed a bit more calories. |
| C．They burned more fat on average. | D．They displayed higher insulin levels. |
| A．A workout after breakfast improves gene performances. |
| B．Too much workout often slows metabolic rates. |
| C．Lifestyle is not as important as morning exercise. |
| D．Physical exercise before breakfast is better for health. |
5 . Education officials and industry experts are debating the future of online learning. The discussion is important because hundreds of universities in the United States have recently moved classes online because of the spread of the novel coronavirus（冠状病毒）.
For Asha Choksi, the rise of Internet-based or online study programs has led to major improvements in higher education. “It’s actually given a lot more power to students in terms of how, when and where they learn,” the head of research for Pearson Education said.
Classes meet online through video conferencing. In this way, students are able to communicate with each other and their professors even when they are far away from school. However, recent research suggests the majority of college students and professors prefer in-person instruction, because they are concerned that companies supervising（监管）online learning programs are not clear about the policies the schools have.
“Students see in-class lectures as opportunities to engage with instructors, peers, and content.” the researchers wrote. In-person learning is especially important in fields like healthcare and teaching. Online education can never really take its place, said Stephanie Hall, a fellow with the independent policy research group The Century Foundation. “Students need to experience...what they’re learning about, reading about or hearing about in the classroom. And I don’t know yet the degree to which technology can facilitate that.”
“When schools make agreements with online program managers to run their online programs, they often do not make important information available to students,” Hall said. This includes how much control the company has over the design of the program or whether the teacher leading the classes was involved in their design. In addition, many colleges and universities advertise online programs as a low cost opportunity for students. But in some cases, students attending in-person classes get financial aid and online students do not.
1. What does Choksi think of the online study programs?| A．They offer students more choices in study. |
| B．They reform the country’s education system. |
| C．They provide advanced scientific knowledge. |
| D．They promote the development of technology. |
| A．It is convenient. |
| B．It costs less to study. |
| C．It can better meet school policies. |
| D．It can improve students’ communication skills. |
| A．change | B．apply |
| C．achieve | D．control |
| A．Hopeful. | B．Critical. |
| C．Uncaring. | D．Neutral. |
6 . Some of the greatest problems we face today are the destruction (破坏)of our environment.Brown clouds, polluted water, endangered wild animals..., these problems seem so huge.
So my family does what we can. We take cloth bags to stores instead of using plastic bags. We walk where we don’t have to drive.
But does it do any good? When I am the only one in line at the market with cloth bags, am I doing any good? Does my walking to stores make any real difference to the world?
I recently learned something about flamingos(火烈鸟)which like to get together in groups of a thousand or more Every year when the time comes for migration (迁徙), a few of them first take off from the lake. But none of the others seem to notice, so the small group returns. However, the next day they try again. This time a few more fly along with them, but most of them still pay no attention, so they return again. They try for several times. Every time a few more birds join in but ,since the thousands of others still take no notice, the great migration plan is once more stopped.
Then one day something changes. The same small group of birds once again starts flying and a small number more join in just as before, then more. Finally, they all take flight and the migration really begins. What a spectacular sight it must be--thousands of flamingos taking off into the sky at once!
A few can make a difference. Even if you’re the one to take the first step, and continue trying,others will someday take notice and together we will solve even our greatest problems.
1. Where would you most probably read this passage?| A．A guidebook. | B．A movie poster. |
| C．An animal magazine. | D．A personal blog |
| A．There are only cloth bags in stores. |
| B．All the people use cloth bags in stores. |
| C．He thinks plastic bags are more expensive. |
| D．He wants to do some good to the environment. |
| A．Disappointing. | B．Fantastic. |
| C．Terrible | D．Surprising |
| A．To show that the writer loves to see the migration of flamingos. |
| B．To tell readers to continue trying and it can make a difference. |
| C．To introduce a special kind of flamingo to readers. |
| D．To show that there' re many problems in the world. |
7 . Being able to take advantage of truly unlimited data is a smartphone user's dream, but everyone I've talked to about 5G is more excited about the usage unlocked by next - generation wireless devices. From smart home security to self - driving cars, all the Internet - connected equipment in your life will be able to talk to each other at lightning - fast speed with reduced delay.
"5 G is one of those forerunners, along with artificial intelligence, of this coming data age, ” said Steve Koenig, senior director of market research for the Consumer Technology Association. "Self - driving vehicles are emblematic in this data age - they show application of data completely. With one single task, driving, you have large amounts of data coming from the vehicle itself, and a variety of sensors (传感器)are collecting a lot of information to model its environment as it moves. It's pulling in data from other vehicles about conditions down the road. There's lots of data behind that task, which is why we need the speed and lower latency ((延迟).
AR glasses and virtual (虚拟的)reality headphones haven't yet been inside the mainstream, but tech companies are joyfully saying that such equipment will eventually replace our smartphones. With 5G, that could actually happen. This is notable because companies such as Apple are reportedly developing AR glasses to improve - or even replace - smartphones.
Ericsson showed at February's Mobile World Congress in 2019 how smart glasses could become faster and lighter with a 5G connection, because instead of being weighed down with components, the glasses could rely on outside equipment for processing power.
But don't get too excited. There's still a lot of work to be done in the meantime, including some necessary testing to make sure the radio plays nicely with basic systems and service construction so that 5G isn, t concentrated only in big cities.
1. What does the first paragraph focus on?| A．Potential of 5G. | B．The super speed of 5G. |
| C．Usage of smart equipment. | D．The future of smart equipment. |
| A．available | B．productive | C．representative | D．popular |
| A．Uncertain. | B．Optimistic. | C．Cautious. | D．Disapproving. |
| A．To make radio play nicely. | B．To construct big 5G cities. |
| C．To do 5G trials effectively. | D．To expand 5G coverage fully. |
8 . A study of 27,000 men showed those skipping (不吃) breakfast were at a greater risk of heart problems. The British Heart Foundation said breakfast helped people resist (抵制) sugary snacks before lunch.
The men, aged 45-82, were studied for 16 years. During that time there were more than 1,500 heart attacks or cases of deadly heart failure. However, people who skipped breakfast were 27% more likely to have heart problems than those who started the day with a meal. The researchers took into consideration other lifestyle risk factors (因素) such as smoking and exercise.
Researcher Dr Leah Cahill told the BBC: “The take-home message is to eat in the morning when you wake up, preferably within an hour. The results show that something is better than nothing, but it’s always better to have something healthy and balanced.”
She said the timing of the meal seemed to be key and waiting until lunch rather than “having breakfast” may be straining (损伤) the body over time. This could be increasing the risk of high blood pressure and fatness which could in turn damage the heart. “Don’t skip breakfast,” Dr Cahill suggested.
Victoria Taylor, an expert with the British Heart Foundation, said: “These researchers only looked at men aged over 45, so we would need to see further research to prove that breakfast has the same effect on the heart health of other groups of people. What we do know is that a healthy breakfast can make that mid-morning biscuit less tempting, as well as giving you another opportunity to widen the variety of foods in your diet. Cereals (谷类食品) with low fat milk are a good way to start the day. Try a banana or dried fruit on top and you’ll be on your way to a fine day before you’ve even left the house.”
1. What does the text mainly deal with?| A．The effects of snacks on the health of the heart. |
| B．An interview by the BBC on people’s lifestyles. |
| C．What a healthy and balanced diet should contain. |
| D．The relationship between breakfast and a healthy heart. |
| A．fix the time for each meal we eat in a day |
| B．make sure our breakfast is always balanced |
| C．eat our breakfast immediately after getting up |
| D．have breakfast within an hour after waking up |
| A．attractive | B．valuable |
| C．obvious | D．familiar |
| A．men over 45 are more likely to get heart diseases |
| B．fresh fruits like bananas are necessary for a healthy breakfast |
| C．it’s healthy to eat some biscuit between breakfast and lunch |
| D．the researchers should have covered other age groups in their study |
9 . More than 10 years ago，it was difficult to buy a tasty pineapple (菠萝)．The fruits that made it to the UK were green on the outside and，more often than not，hard with an unpleasant taste within.Then in 1996，the Del Monte Gold pineapple produced in Hawaii first hit our shelves.
The new type of pineapple looked more yellowygold than green. It was slightly softer on the outside and had a lot of juice inside.But the most important thing about this new type of pineapple was that it was twice as sweet as the hitandmiss pineapples we had known.In no time，the Del Monte Gold took the market by storm，rapidly becoming the world’s bestselling pineapple variety，and delivering natural levels of sweetness in the mouth，up until then only found in tinned pineapple.
In nutrition (营养) it was all good news too.This nicetasting pineapple contained four times more vitamin C (维生素C) than the old green variety.Nutritionists said that it was not only full of vitamins，but also good against some diseases.People were understandably eager to be able to buy this wonderful fruit.The new type of pineapple was selling fast, and the Del Monte Gold pineapple rapidly became a_fixture in the shopping basket of the healthy eaters.
Seeing the growing market for its winning pineapple，Del Monte tried to keep the market to itself.But other fruit companies developed similar pineapples.Del Monte turned to law for help，but failed.Those companies argued successfully that Del Monte’s attempts to keep the golden pineapple for itself were just a way to knock them out of the market.
1. We learn from the text that the new type of pineapple is________.| A．green outside and sweet inside |
| B．goodlooking outside and soft inside |
| C．yellowygold outside and hard inside |
| D．a little soft outside and sweet inside |
| A．It was rich in nutrition and tasted nice. |
| B．It was less sweet and good for health. |
| C．It was developed by Del Monte. |
| D．It was used as medicine. |
| A．that people enjoy eating |
| B．that is always present |
| C．that is difficult to get |
| D．that people use as a gift |
| A．allowed other companies to develop pineapples |
| B．succeeded in keeping the pineapple for itself |
| C．tried hard to control the pineapple market |
| D．planned to help the other companies |
