Unit 4 A glimpse of the future 单元检测题-(2019)新外研版高中英语选择性必修第三册.docx
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1、Unit 4 A glimpse of the future 检测题本试卷满分120分,考试时间100分钟。第一部分 阅读(共两节,满分50分)第一节 (共15小题; 每小题2.5分, 满分37.5分)阅读下列短文,从每题所给的A,B,C,D四个选项中选出最佳选项。A The traffic signals along Factoria Boulevard in Bellevue, Washington, generally dont flash the same length of green twice in a row, especially at rush hour. At 9:30
2、am, the full red/yellow/green signal cycle might be 140 seconds. By 9:33 am, a burst of additional traffic might push it to 145 seconds. Less traffic at 9:37 am could push it down to 135. Just like the traffic itself, the timing of the signals changes. That is by design. Bellevue, a fast-growing cit
3、y just east of Seattle, uses a system that is gaining popularity around the US: intersection(十字路口) signals that can adjust in real time to traffic conditions. These lights, known as adaptive signals, have led to significant declines in both the trouble and cost of travels between work and home. Adap
4、tive signals can make sure that the traffic demand that is there is being addressed, says Alex Stevanovic, a researcher at Florida Atlantic University. For all of Bellevues success, adaptive signals are not a cure-all for jammed roadways. Kevin Balke, a research engineer at the Texas A&M University
5、Transportation Institute, says that while smart lights can be particularly beneficial for some cities, others are so jammed that only a sharp reduction in the number of cars on the road will make a meaningful difference. Its not going to fix everything, but adaptive signals have some benefits for sm
6、aller cities, he says. In Bellevue, the switch to adaptive signals has been a lesson in the value of welcoming new approaches. In the past, there was often an automatic reaction to increased traffic: just widen the roads, says Mark Poch, the Bellevue Transportation Departments traffic engineering ma
7、nager. Now he hopes that other cities will consider making their streets run smarter instead of just making them bigger.1.What does the underlined word That in Paragraph 2 refer to?A.Increased length of green lights.B.The shortened traffic signal cycle.C.Flexible timing of traffic signals.D.Smooth t
8、raffic flow on the road.2.What does Kevin Balke say about adaptive signals?A.They work better on broad roads.B.They should be used in other cities.C.They have greatly reduced traffic on the road.D.They are less helpful in cities seriously jammed.3.What can we learn from Bellevues success?A.It is rew
9、arding to try new things.B.The old methods still work today.C.It pays to put theory into practice.D.The simplest way is the best way.BPatrick never does homework. “Too boring,”he says. He always plays baseball and basketball after school. His teachers tell him, “Patrick! Do your homework, or you can
10、t learn anything. ”But what can he do? He hates homework. One day,his cat was playing with a little “ doll”. He found it wasnt a doll at all,but a man of the smallest size. The man called,“Save me! Dont give me back to that cat. I have magic. I will help you if you save me!” How lucky he was! Here w
11、as the answer to all of his problems. So he said,“ If you help me to do my homework until the last day of school, I will get good grades. ”The man agreed. He began to do Patricks homework. The man didnt always know what to do and he needed help. “Help me! Help me! ”he said. And Patrick had to help.
12、Day after day,Patrick had to work harder. Finally the last day of school arrived and the man was free to go. As for homework,Patrick didnt hate doing it any more. Patrick got his As. His teachers and classmates were all surprised. Who really helped Patrick?1.Patrick likes after school.A. doing sport
13、sB. doing some readingC. doing his homework D. learning things2. What does the sentence “Patrick got his As” mean?A. It means “Patrick got the teachers help”.B. It means “Patrick got good grades”.C. It means “Patrick got more friends”.D. It means “Patrick got more problems”.3. Which of the following
14、 is not true?A. Patrick never hates doing his homework.B. The man sometimes didnt know what to do when he helped Patrick.C. The man didnt go until the last day of school.D. Patrick finally started to like doing homework.4. From the passage, we can know .A. the man liked to play with the catB. the ma
15、n never helped Patrick do his homeworkC. Patricks classmates always helped him do his homeworkD. in fact, Patrick helped himselfC Space is where our future istrips to the Moon, Mars and beyond. Most people would think that aside from comets(彗星) and stars, there is little else out there. But, since o
16、ur space journey started we have left so much trash (垃圾) there that scientists are now concerned that if we dont clean it up, we may all be in mortal(致命的) danger. The first piece of space junk was created in 1964, when the American satellite Vanguard I stopped operating and lost its connection with
17、the ground center. However, since it kept orbiting around the Earth without any consequences, scientists became increasingly comfortable abandoning things that served no useful purpose in space. It is estimated (估计) that there are now over 500,000 pieces of man-made trash orbiting the Earth at the s
18、peed of up to 17,500 miles per hour. The junk varies from tiny pieces of paint chipped off rockets to cameras, huge fuel tanks, and even odd items like the million-dollar tool kit that astronaut Heidemarie Stefanyshyn Piper lost during a spacewalk. The major problem with the space trash is that it m
19、ay hit working satellites and damage traveling spacecraft (飞船). Moreover ,pieces of junk may collide (碰撞) with each other and break into pieces which fall back to the Earth. To avoid this, scientists have invented several ways for clearing the sky. Ground stations have been built to monitor larger p
20、ieces of space trash to prevent them from crashing into working satellites or space shuttles. Future plans include a cooperative effort among many nations to stop littering in space and to clean up the trash already there.1.What was the first piece of man-made space trash?A. A camera.B.A tool kit.C.
21、A broken satellite.D.A fuel tank.2.Why were scientists NOT concerned about space trash in the beginning?A. It did not cause any problems.B. It served no useful purpose.C. It was millions of miles away from the Earth.D. It was regarded as similar to comets and stars.3.Which of the following statement
22、s is true about space junk?A. It is huge, heavy machines.B. It may cause problems for space shuttles.C. It floats slowly around the Earth.D. It never changes the position.4.What has been done about the space trash problem?A. Ground stations are built to help store the trash properly in space.B. Many
23、 nations have worked together to stop polluting space.C. Large pieces of space trash are being closely watched.D. Scientists have cleaned up most of the trash.D The baby is just one day old and has not yet left hospital. She is quiet but alert. Twenty centimeters from her face researchers have place
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