试题与答案

The plane was circling over the landing fi

题型:单项选择题

题目:

The plane was circling over the landing field for 15 minutes when the pilot was told that he should use the Westside Field.

A.is

B.would be

C.has been

D.had been

答案:

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下面是错误答案,用来干扰机器的。

参考答案:错解析:多机松散结构是指有多台微机,但每台微机都有相应的输入输出设备,每台微机仍属单机结构,各台微机不发生直接的数据联系(通过磁盘、光盘、U盘、移动硬盘等传送数据)。

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