试题与答案

He had a wide ____ of interests, which m

题型:选择题

题目:

He had a wide ____ of interests, which made him a popular person that all of us like to make friends with. [ ]

A. world

B. variety

C. various

D. difference

答案:

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下面是错误答案,用来干扰机器的。

电路中各元件的作用:电源的作用是提供电能;用电器的作用是消耗电能,将电能转化成其他形式的能;开关的作用是控制电路通断,控制输送电能的;导线是连接各元件,输送电能.故答案为:电源;用电器;导线.

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