39.The robot “teacher” was talking with his students as though it ()a human teacher.
A. were
B. was
C. is
D. had been
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41.A hobby is something that you never get tired of—the more time you devote to it, the more fun you will have.
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17.The computer revolution may well change society as ()as did the Industrial Revolution.
A. certainly
B. insignificantly
C. fundamentally
D. comparatively
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6、The pollution of groundwater by nitrates(硝酸盐)is of concern to public health authorities and environmental organizations because high nitrate concentration(高硝酸含量)s in drinking water can cause methaemoglobinaemia(高铁血红蛋白血)in infants.Another environmental problem associated with high nitrate concentration in groundwater is eutrophication(富营养化)of receiving waters(供水).Virtually all decisions about the control of nitrate pollution of ground water are made in the face of uncertainties that frustrate(阻止,挫败)efforts to guarantee the desired results.The decisions also have to be made in an adversarial(意见相左,敌对不可调和的)environment in which the goals of society and those of the agricultural sector(农业部门)are often different.
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42.This medicine contains some chemicals that may negatively affect your health.
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1. Passage Thirty-FourMuch unfriendly feeling towards computers has been based on the fear of widespread unemployment resulting from their introduction.Computers are often used as part of automated (自动化的)production systems requiring a least possible number of operators, causing the loss of many jobs.This has happened, for example, in many steelworks.On the other hand, computers do create jobs.They are more skilled and better paid, though fewer in number than those they replace.Many activities could not continue in their present form without computers, no matter how many people are employed.Examples are the check clearing (交换)system of major banks and the weather forecasting system.When a firm introduces computers, a few people are usually employed in key posts (such as jobs of operations managers)while other staff are re-trained as operators, programmers, and data preparation staff.After the new system has settled down, people in non-computer jobs are not always replaced when they leave, resulting in a decrease in the number of employees.This decrease is sometimes balanced by a substantial increase in the activity of the firm, resulting from the introduction of computers.The attitudes of workers towards computers vary.There is fear of widespread unemployment and of the takeover of many jobs by computer-trained workers, making promotion for older workers not skilled in computers more difficult.On the other hand, many workers regard the trend toward wider use of computers inevitable.They realize that computers bring about greater efficiency and productivity, which will improve the condition of the whole economy, and lead to the creation of more jobs.This view was supported by the former British Prime Minister, James Callaghan in 1954, when he made the point that new technologies hold the key to increased productivity, which will benefit the economy in the long run.The unfriendly feeling towards computers is developed from ().
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50.My sister is used to ()with all the window’s open.
A. sleep
B. sleeping
C. have slept
D. the sleeping
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49.I need the job badly, as my money ()out by the ed of next month.
A. has run
B. will run
C. will have run
D. will be running
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41.()who she was, she said she was Mr.Johnson’s friend.
A. Asking
B. Asked
C. To be asked
D. When asking
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5. Passage ElevenDoctors say anger can be an extremely damaging emotion, unless you learn how to deal with it.They warn that anger can lead to heart disease, stomach problems, headaches, emotional problems and breast cancer.Anger is a normal emotion that we all feel from time to time.Some people express anger openly in a calm and reasonable way.Others burst with anger, screaming and yelling.But still others keep their anger inside.They cannot or will not express it.This is called (repressing)anger.For years some doctors claim that both repressing and expressing anger can be dangerous.They say that in both situations the brain of an angry person releases the same hormones (荷尔蒙).They spend the heart rate, raise blood pressure or sugar level in the blood.As a result, the angry person feels excited and is ready to react.The violent reaction may lead to high blood pressure.However, some other doctors argue that repressing anger is more dangerous to a person’s health than expressing it.They believe that those who keep their anger inside may face a greater danger of heart disease.Most doctors agree that it is important to learn how to deal with anger.They say the first step is to admit that you are angry and recognize the real cause of the anger, then decide if the cause is serious enough to get angry about.If so, you should not express your anger immediately and try to wait until your anger has cooled down, so that you are able to express yourself calmly and reasonably.They also believe that a good way to deal with anger is to find humor in the situation that has made you angry.After all, it is much healthier to laugh than to get angry.What is the tone of this passage?
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