细胞周期中,中心粒开始分离是发生在()A、G1期 B、S期 C、G2期 D、分裂期

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问题:

细胞周期中,中心粒开始分离是发生在()

A、G1期

B、S期

C、G2期

D、分裂期

考点:生物学细胞生物学细胞生物学题库
题型:单项选择题

设备的布局要有利于日常保养和搬运工作。

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阅读理解。

     The common cold is the world's most widespread illness, which is plagues (疫病) that flesh receives.

     The most widespread fallacy (谬误) of all is that colds are caused by cold. They are not. They are caused

by viruses (病毒) passing on from person to person. You catch a cold, and it would be reasonable to expect

the Eskimos to suffer from them forever. But they do not. And in isolated arctic regions explorers have reported

being free from colds until coming into contact again with infected people from the outside world by way of

packages and mail dropped from airplanes.

     During the First World War soldiers who spent long periods in the trenches (战壕),cold and wet, showed

no increased tendency to catch colds.

     In the Second World War prisoners at the notorious Auschwitz concentration camp (奥斯维辛集中营),

naked and starving, were astonished to find that they seldom had colds.

     At the Common Cold Research Unit. England, volunteers took part in experiments in which they gave

themselves to the discomforts of being cold and wet for long stretches of time. After taking hot baths, they put

on bathing suits, allowed themselves to be dipped with cold water, and then stood about dripping wet in drafty

room. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not one of the

volunteers came down with a cold unless a cold virus was actually dropped in his nose.

     In the cold we have nothing to do with catching colds, but why are they more frequent in the winter?

Despite the most pains-taking research, no one has yet found the answer. One explanation offered by scientists

is that people tend to stay together indoors more in cold weather than at other times, and this makes it easier

for cold viruses to be passed on.

     No one has yet found a cure for the cold. There are drugs and pain suppressors (止痛片) such as aspirin,

but all they do is to relieve the symptoms (症状).

1. The writer offered _____ examples to support his argument.

A. 4

B. 5

C. 6

D. 3

2. Which of the following does not agree with the chosen passage?

A. The Eskimos do not suffer from colds all the time.

B. Colds are not caused by cold.

C. People suffer from colds just because they like to stay indoors.

D. A person may catch a cold by touching someone who already has one.

3. Arctic explorers may catch colds when _____.

A. they are working in the isolated arctic regions

B. they are writing reports in terribly cold weather

C. they are free from work in the isolated arctic regions

D. they are coming into touch again with the outside world

4. Volunteers taking part in the experiments in the Common Cold Research Unit _____.

A. suffered a lot

B. never caught colds

C. often caught colds

D. became very strong

题型:单项选择题

报送反洗钱非现场监管报表应遵循()原则。

A.及时性原则;

B.完整、准确性原则;

C.保密性原则;

D.审慎性原则

题型:单项选择题

避暑山庄的“淡泊敬诚殿”取自三国时期大政治家诸葛亮《诫子书》中的哪句话?

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盗窃信用卡并使用的行为,构成()

A、诈骗罪

B、信用卡诈骗罪

C、侵占罪

D、盗窃罪

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