2. 外语
  3. Much unfriendly feeling towards computers has based on the fear of widespread unemployment resulting from their introduction.

Much unfriendly feeling towards computers has based on the fear of widespread unemployment resulting from their introduction.

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问题     Much unfriendly feeling towards computers has based on the fear of
widespread unemployment resulting from their introduction.
    Computers are often used as part of automated production systems
required a least possible number of operators, causing the loss of many      【M1】 ______
jobs. This has been happened, for example, in many steelworks.               【M2】 ______
    On the other hand, computers does create jobs. They are more skilled     【M3】 ______
and better paid, though less in number than those they replaced. Many        【M4】 ______
activities can not continue in their present form without computers, no      【M5】 ______
matter how many people are employed. Examples is the check clearing(票据     【M6】 ______
交换)system of major banks and the weather forecasting system.
    When a firm introduces computers, few people are usually employed        【M7】 ______
in key posts(such as jobs of operation managers)while other staff is re      【M8】 ______
trained as operators, programmers, data preparation staff. After the new
system have settled down, people in non-computer jobs are not always         【M9】 ______
replaced.
    When they leave, resulting to a decrease in the number of employees.     【M10】 ______
This decrease is sometimes balanced by a substantial increase in the activity
of the firm, resulting from the introduction of computers.
【M1】
选项
答案required应改为requiring
解析 因为它与前边所修饰的词system存在逻辑上的主谓关系，而且system与requiring是主动的关系，因此应用现在分词做system的修饰语，而不能用表示被动意思的required。
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