单项选择题

What did the author mean by" I am not alone" in paragraph 1

A．He and his family all didn’t know how to use the machine.
B．His family supported his opinion.
C．Many people faced the trouble as he did.
D．He was a popular guy.

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单项选择题

One of the reasons why VCRs are so difficult to use is that ________.

A．the designers are often insensitive to the operational complexities of their machines
B．the range of features provided is unlimited
C．there is no ideal way of controlling quality
D．their designers often ignore the complaints of their users

单项选择题

According to the passage, before a VCR is sold on the market its original model should be tried out ________.

A．among ordinary consumers who are not technically minded
B．among people who are technically minded
C．among experienced technicians and potential users
D．among people who are in charge of public relations

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