186. I only _______ him from my wife, bu

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问题选择题

186. I only _______ him from my wife, but I have never met him.

A．know

B．know of

C．know to

D．know by

答案

答案：B

选择题

I have got a loaf of bread; now I'm looking for a knife____. [ ]

A. to cut it with

B. to cut with it

C. with it to cut

D. it to cut with

单项选择题

半个世纪以来，对计算机发展的阶段有过多种描述。下述说法中，比较全面的描述是______。

A．计算机经过三个发展阶段，电子管阶段、晶体管阶段、集成电路阶段

B．计算机经过四段发展，即大型机、中型机、小型机、微型机

C．计算机经过三段发展，即大型机、微型机、网络机

D．计算机经过五段发展，即大型主机、小型机、微型机、局域网、广域网