题目内容

We don't think it is a good habit for Tom to______ in affairs that are of no concern to him.

A. impart
B. ponder
C. abound
D. meddle

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【C3】

A. area
B. range
C. scope
D. field

Structurally, the inside of early Christian churches was quite simple.

A. layout
B. design
C. interior
D. content

This book is essential to anyone interested in space exploration.

A. dispensable
B. indisputable
C. indispensable
D. disputable

桥式整流电容滤波电路的变压器二次电压为20 V，当RLC≥(3～5)T／2时，输出电压为()。

A. 28 V
B. 9 V
C. 24 V
D. 18 V