听泡向背侧方向延伸分化为背侧的()和腹侧的(),前者形成()和()的上皮,后者形成(

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问题:

听泡向背侧方向延伸分化为背侧的()和腹侧的(),前者形成()和()的上皮,后者形成()和()的上皮。

考点:生物学组织学与胚胎学组织学与胚胎学题库
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陈新的父亲到银行存入20000元人民币,存期一年,年利率为1.98%,到期应交纳所获利息的20%的利息税,那么到期取款并交利息税后,陈新的父亲可取回(  )

A.20158.4元

B.20316.8元

C.20396元

D.20198元

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Ich halte es in diesem Wohnviertel nicht mehr aus, dachte er. Das bedeutet: ________

A.Er durfte nicht aus seiner Wohnung ausziehen.

B.Er konnte die schwierige Situation hier nicht mehr ertragen.

C.Er wollte nicht mehr alleine ausgehen.

D.Er hatte alles in diesem Wohnviertel sehr gern.

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阅读理解

     Are you feeling blue? An American study suggests that being surrounded by happy friends and

neighbors could have more of an effect on your happiness than money. That is the finding of researchers

from Harvard University and the University of California at San Diego.

     Nicholas Christakis and James Fowler studied the emotional health of more than four thousand seven

hundred people. They used information from the Framingham Heart Study. That study began sixty years

ago in the American community of Framingham, Massachusetts. It was started to learn more about the

risks of heart attack and stroke. For the new study, the researchers examined the emotions of the men

and women in the Framingham Heart Study. The information was gathered from 1983 to 2003.

     The researchers found that friends of happy people had a greater chance of being happy themselves.

That means that happiness spreads, or has a contagious effect, among people. And, the smaller the

physical distance between friends, the larger the effect they had on each other's happiness. For example,

a person was twenty percent more likely to feel happy if his/her friend living within one and a half

kilometers was also happy. Having a happy neighbor who lived next door increased an individual's

chance of being happy by thirtyfour percent.The effects of friends' happiness lasted for up to a year.

     Another finding was that people who worked together or were married did not have as much of an

effect on happiness levels as friends did. The researchers said this was often true among friends of the

same sex. A report on the findings was published this month in the British Medical Journal.America's

National Institute on Aging helped to pay for the study. Some researchers who were not involved with

the study questioned its findings. They said the results could be disputed(争议) unless a separate study

showed similar findings.

1. What does this text mainly tell us?

A. How to live a happy life?

B. One's happiness influences others.

C. How to keep emotions healthy?

D. A scientific experiment.

2. From this text we know that ________.

A. Nicholas and James based their findings on the study of a medical research

B. Nicholas and James have been doing their research for more than twenty years

C. a person with a happy friend has more chance of feeling blue

D. a happy person is more likely to suffer from heart attack

3. The underlined word "contagious" in the third paragraph means ________.

A. contacting  

B. embarrassing

C. spreading

D. frightening

4. According to this text, which of the following four persons may have a larger effect on Mrs. Smith's

happiness?

A. Mr. Green, Smith's former classmate.

B. Mr. Thomas, Smith's colleague.

C. A friend in another city.

D. A happy single lady next door.

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施工生产管理

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下列对于网系统的防火墙的描述错误的是()。

A.控制对系统的访问

B.集中的安全管理

C.增强的保密性

D.防止内部和外部的威胁

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