题目内容

当采用（）输入操作情况下，除非计算机等待数据准备好，否则无法传送数据给计算机。

A. 无条件传送方式
B. 程序查询方式
C. 中断方式
DMA方式

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There are ten sentences in this section. Beneath each sentence there are four choices or phrases marked A, B, C and D. Choose one word or phrase that best completes the sentences.Tom and Dick were both heroes, but only ________ is remembered today.

A. the later
B. the latter
C. latter
D. later

The watch is _________ about eighty yuan.

A. worthy
B. worthwhile
C. worth
D. worth of

You can _________ them to paint something especially for you.

A. commit
B. communicate
C. mission
D. commission