问题 填空题

如图(1)所示是演示砂摆振动图象的实验装置,砂摆的摆幅较小时可看作简谐振动.砂摆摆动时,手拉纸的速率恒为0.3m/s,实验结果如图(2)所示.由图所提供的信息,可测得砂摆的周期为______s,砂摆的摆长为______m(g取10m/s2).

答案

砂摆完成一次全振动,纸向前移动的距离为30cm,移动的时间等于砂摆的周期,所以T=

x
v
=1s.根据单摆的公式T=2π
L
g
,L=
gT2
4π2
=0.25m.

故本题答案为:1,0.25.

阅读理解

阅读理解。

     It is really possible to be bored to death,scientists have found.Researchers say that

people who live a boring life are more likely to die young,and that those who experienced

"high levels" of boredom are at double risk (危险) of dying from heart disease or a stroke

than those who are satisfied with their life.

     Researchers studied the results of 7,524 people aged between 35 and 55 who were

interviewed between 1985 and 1988 about their levels of boredom.Of those 7,524 people

who were monitored (跟踪调查) over 25 years,those who said____________were nearly

40 percent more likely to have died by the end of the study than those who did not.

     The original survey found one in ten people had been bored within the past month,with

women more than twice as likely as men to suffer from boredom.Younger employees and

those with more boring jobs were also found to be more likely to suffer from boredom.

     Martin Shipley,who wrote the report,said,"People who are bored are more likely to turn to

unhealthy habits like drinking,smoking,taking drugs,and getting addicted to the Internet,which

can cut people's lifeexpectancy (寿命).It_is_important_that_people_who_have_dull_jobs

_find_outside_interests_to_keep_off_boredom,rather_than_turn_to_drinking_or_smoking."

     A scientist said those who are bored should try to be happier by thinking more about the

needs of others."From being all me,me,me,they should be thinking-what can I do for my

family,my friends,my colleagues,even my boss?" he said.

1.What's the main idea of the passage?(Please answer within 8 words.)

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2.Fill in the blank in Paragraph 2 with proper words.(Please answer within 5 words.)

________________________________________________________________________

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3.What does the original survey show about people?(Please answer within 15 words.)

________________________________________________________________________

________________________________________________________________________

4.Which sentence in the passage is the closest in meaning to the following one?

According to a scientist,people who feel bored should focus more on the needs of others in

order to be happier.

________________________________________________________________________

________________________________________________________________________

5.Translate the underlined sentence in Paragraph 4 into Chinese.

________________________________________________________________________

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单项选择题