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.

admin2010-10-14  65
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.
【M2】
选项
答案has been happened应改为has happened
解析 因为happen为不及物动词，不能用于被动语态。
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大学英语四级

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