The underlined word“this”in the second paragraph refers to the change that__________．

A．each nail could be taken the place of by every other nail

B．each nail was exactly like every other nail

C．producing tasks became smaller and smaller

D．goods could be mass produced

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参考答案

答案解析

理解题。在条件句中，this指下文“900ds could be mass produced”(货物大批生产)。所以此题选择D

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1 According to the writer，highly skilled workers__________．

A．completely disappeared with the coming of the factory system

B．were dismissed by the boss

C．were unable to produce goods of high standard

D．were unable to produce fine goods at that same speed as machines

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2 According to the passage，what did the farmers have to do with the coming of mechaniza-fion of agriculture?

A．Many of them had to Ieave their farmland for industrial centers．

B．They stuck to their farm work．

C．They refused to use machines．

D．They did their best to learn how to use the machines．

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3 根据下面资料，回答题
"We are not about to enter the Information Age, but instead are rather well into it. " Present predictions are that by 1990, about thirty million jobs in the United States, or about thirty percent of the job market, will be computer-related. In 1980, only twenty-one percent of all American high schools owned one or two computers for student use. In the fall of 1985, a new study showed that half of United States secondary schools have fifteen or more computers for student use. And now educational experts, administrators, and even the general public are demanding that all students become "computer-literate". By the year 2000 knowledge of computers will be necessary in over eighty percent of all occupations. Soon those people not educated in computer use will be compared to those who are print-illiterate today.
What is "computer literacy" ? The term itself seems to imply some degree of "knowing" about computers, but knowing what? The present opinion seems to be that this should include a general knowledge of what computers are, plus a little of their history and something of how they operate.
Therefore, it is important that educators everywhere take a careful look not only at what is be-ing done, but also at what should be done in the field of computer education. Today most adults are able to use a motor car without the slightest knowledge of how the internal combustion engine(内燃机) works. We effectively use all types of electrical equipment without being able to tell theft histories or to explain how they work.
Business people for years have made good use of typewriters and adding machines, yet few have ever known how to repair them. Why, then, attempt to teach computers by teaching how or why they work?
Rather, we first must fix our mind on teaching the effective use of the computer as the tool is.
"Knowing how to use a computer is what´ s going to be important. We don´ t talk about ´ au-tomobile literacy´. We just get in our cars and drive them. "
In 1990, the number of jobs having nothing to do with computers in the United States will be reduced to__________．

A．79 million

B．100 million

C．30 million

D．70 million

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