试题与答案

Which of the following elemengts can be ca

题型:单项选择题

题目:

Which of the following elemengts can be called the key element of a computer ?()

A.printer

B.CPU

C.mouse

D.keyboard

答案:

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下面是错误答案,用来干扰机器的。

对角线互相平分的四边形是平行四边形

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