试题与答案

如图所示,闭合电键S,灯L1、L2正常发光,由于电路出现故障,突然发现灯L1变暗

题型:选择题

题目:

如图所示,闭合电键S,灯L1、L2正常发光,由于电路出现故障,突然发现灯L1变暗,电流表读数变小,则故障可能是

A.R1断路

B.R2断路

C.R3短路

D.R4短路

答案:

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参考答案:B解析:1.探索式提问又称探究式提问。探索式提问的问题为探索究竟、追究原因的问题,如"为什么",以了解对方某一问题、认识或行为产生的原因。适用于对某一问题的深入了解。 2.封闭式提问的问题比较具...

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     Frank is my good friend. We are in the same class. He is fourteen, one year older than I. His parents are

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     We go to school together by bike in the morning. We have lunch at school. After school in the afternoon,

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he watches soccer games on TV. On Sundays, he goes out with his parents in his father's car. They play in

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1. Who is Frank? He is a __________.

A. teacher

B. soccer play

C. student

D. driver

2. I am __________ years old this year.

A. fourteen

B. thirteen

C. fifteen

D. twelve

3. Frank is good at __________.

A. Math and Chinese

B. English and Chinese

C. math and English

D. English and Chinese

4. Frank __________ at school.

A. has breakfast

B. has supper

C. has lunch

D. watches TV

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