云南开放大学城市轨道交通专业英语离线作业7

离线作业7
I. Choose the best answer:
1. The man _________ my father is our English teacher.
A. talking with B. talks with C. talked with D. talk with
2. If there were no examinations, we should have ___________ at school.
A. a much happiest time B. a more happier time C. much happy time
D. a much happier time
3. Neither side is willing to _________, so there’s nothing that can be done.
A. make the first move B make a fuss about C. make short work of
D. make a fool of
4.She _______the first prize, because winning the first prize was her childhood dream.
A. stood for B. accounted for C. inquired for D. went for
答案：1.A 2.D 3.A 4.D
II. Translate the following phrases:
1.A power substation 2. reliable technology 3. electronic surveillance
4. remote control terminal
答案：1. 变电所 2. 可靠的技术 3.电子监控 4. 远方控制终端
III. Translate the following sentences:
1.Modern mass transmit vehicle are capable of feeding up to 40% of the energy generated in baking mode back into the power supply system.
2.In DC traction systems impermissible touch voltage may occur between the return circuit and the structure earth due to operational and short-circuit currents.
3.This system permits evaluation of the stay-current conditions of the track and the early detection of insulation deficiencies, thus enabling measures to be taken to prevent damage due to stray-current corrosion.
答案：1.现代化的大容量交通车辆有能力供给40%的再生能量，该能量是在制动状态下产生的，可以反馈到电力系统。
2.在直流牵引系统，在回路和建筑接地之间，由于操作电流和短路电流的原因，不许可的接触电压可能出现。
3.这一系统允许对轨道杂散电流的状况进行评估，也可以对绝缘缺陷进行早期检测，这样能够采取措施阻止由于杂散电流腐蚀引起的破坏。
IV. Change the following sentence patterns according to the requirement:
1.Too many trees are still being cut down in the USA. (变主动句)
2.Tom didn’t take part in the after-school activity yesterday. (变反意疑问句)
3.He set alarm clock for seven. (变一般疑问句)
答案：1. They are still cutting down too many trees in the USA.
2. Tom didn’t take part in the after-school activity yesterday, did he?
3. Did he set alarm clock for seven?
V. Reading comprehension:
In the United States, 30 percent of the adult population has a “weight problem”. To many people the cause is obvious: we eat too much. But scientific evidence(证据) does little to support this idea. Going back to America of 1910. We find that people were leaner (较瘦) than today, yet they ate more food. In those days people worked harder physically, walked more, used machines much less, and didn’t watch television.
Several modern studies, moreover, have shown that fatter people do not eat more on average than thinner people. A 1979 study of 3,545 London office workers showed that fat people eat less than slim people.
Studies also show that slim people are more active than fat people. A study by a research group at Stanford University found the following interesting fact: the more the man ran, the greater he will loss of body fat.
The more they ran, the greater they will increase in food intake.
Thus, those who ran the most ate the most, yet lost greater amount of body fat.
1. Nowadays many Americans have the problem that ________.
A. they are too slim B. they work too hard
C. they are too fat D. they lose too much body fat
2. According to the passage, how many people in 900 adult Americans have a “ weight problem”? ________
A. 150 B. 300
C. 600 D. 270
3. Is there any scientific advice to support the idea that eating too much is the cause of a “weight problem”? _________
A.Yes, there is plenty of evidence.
B.Of course, there is some evidence to support this.
C.There is hardly any scientific evidence to support this.
D. We are not sure.
4. The Americans in 1910 ________.
A.ate more food and had more physical activities
B.ate less food but had more activities
C.ate less food and had less physical exercise
D.had more weight problems
5. Which of the following statements is true according to the researches?
A. Fat people eat less food and are less active.
B. Fat people eat more food than slim people and more active.
C. Fat people eat more food than slim people but are less active.
D. Thin people run less but have greater increase in food in-take.
答案： 1.C 2.D 3.C 4.A 5.A