Miss Gogers taught physics in a New York school. Last month she explained to one

Miss Gogers taught physics in a New York school. Lastmonth she explained to one of her classes about sound, and she decided to testthem to see how successful she had been in her explanation. She said to them,“Now I have a brother in Los Angeles. If I was calling him on the phone and atthe same time you were 75 feet away, listening to me from across the street,which of you would hear what I said earlier, my brother or you and for whatreason?”

Tom at once answered, “Your brother. Becauseelectricity travels faster than sound waves.” “That's every good,” Miss Gogersanswered; but then one of the girls raised her hand, and Miss Gogers said.“Yes, Kate.”

“I disagree,” Kate said. “Your brother would hear youearlier because when it's 11 o'clock here it's only 8 o'clock in Los Angeles.”

1.Miss Gogers was teaching her class_________.

A．how totelephone 　                    B．aboutelectricity

C．about timezone(时区) 　                 D．about sound

2.Miss Gogers raised this question because she wantedto know whether______.

A．it was easyto phone to Los Angeles 　       B．her studentcould hear her from 75 feet away

C．her studentshad grasped（理解）her lesson. D．sound waves were slowerthan electricity

3.Tom thought that electricity was _________.

A．slower thansound waves              B．faster thansound waves

C．not so fastas sound waves             D．as fast assound waves

4.Kate thought Tom was wrong because _______.

A．clocks in LosAngeles showed a different time from those in New York

B．electricitywas slower than sound waves

C．Tom was notgood at physics at all

D．Tom's answerhad nothing to do with sound waves

5.Whose answer do you think is correct according tothe law of physics?

A．Tom's            B．Kate's            C．Bath A and B       D．Neither A norB

试题答案

【答案】

1.D

2.C

3.B

4.A

5.A

【解析】

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