试题与答案

_____.a small advertisement held my atte

题型:选择题

题目:

_____.  a small advertisement held my attention.  which read "Easy job. Good wages. No

experience necessary."[ ]

A.  Looking through the newspaper    

B.  While I was looking through the newspaper

C.  To look through the newspaper  

D.  I was looking through the newspaper

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0522/654c4e96003561ce2cd72d865cdcb2d9.html

下面是错误答案,用来干扰机器的。

答案:A

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题型:选择题

电阻R、电容C和电感器L是常用的电子元器件,在频率为f的交变电流电路中,如图所示,当开关S依次分别接通R、C、L支路,这时通过各支路的电流有效值相等.若将交变电流的频率提高到2f,维持其它条件不变,则下列几种情况不正确的是(  )

A.通过R的电流有效值不变

B.通过C的电流有效值最大

C.通过L的电流有效值最小

D.通过R、C、L的电流有效值都不变

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