肺通气的原动力是A.肺的节律性收缩和舒张 B.肺的弹性回缩 C.呼吸运动 D.胸内负

题型:单项选择题

问题:

肺通气的原动力是

A.肺的节律性收缩和舒张

B.肺的弹性回缩

C.呼吸运动

D.胸内负压的周期性变化

E.肺内压与大气压之间酌压力差

考点:公卫执业助理医师公卫执业助理医师31
题型:单项选择题

如图表示电解水的简易装置.请回答下列问题:

(1)与甲试管中的电极相连的是电池______(填“正”或“负”)极,乙试管中产生的气体是______;

(2)写出检验乙试管中气体的方法:

______;

(3)如果用V和V分别表示甲试管和乙试管中产生气体的体积,则V:V约等于______;

(4)电解水反应的化学方程式为______,反应类型是______;如果该实验中产生氧气0.1mol,则生成氢气的物质的量为______.

题型:单项选择题

We can have _______ bluer sky if we create _______ less polluted world. [ ]

A. a;  a

B. a;  the

C. the;  a

D. the;  the

题型:单项选择题

How Good Are US Drivers?

The CBS-TV“National Drivers’ Test”,showed that many US drivers have a lot to learn.Here’s why.

CBS picked 1799 sample drivers to take the test in TV studios in New York,Philadelphia,Chicago,and Los Angeles.More than two out of five of the drivers failed the test.And the average score was the lowest passing mark—51 points out of a possible 80.

Chicago drivers did best with an average of 53 points.Los Angeles drivers came next with 52 points.New York and Philadelphia drivers got 50 points—a failing score.Drivers with 50 points or less were rated“poorly informed”by the judges.

Here are some of the test results:

1.Are men drivers better informed than women ones?

Yes.Men averaged 52 points.Women got an average of 49.

2.Are older drivers better informed than younger drivers?

No.Drivers under 26 averaged 52 points.Drivers from 27 to 45 averaged 51.Drives over 45 failed with a 48-point average.

3.Does education make a difference?

Yes.College graduates averaged 52 points.High school graduates averaged 50.Those without high school diplomas(毕业证) got 48.And people who had taken driver education courses scored an average of 53 points—three more than those who hadn’t.

4.Does driving experience make a difference?

Yes.Drivers with three or more years of experience averaged 51 points.Drivers with less experience averaged 49.

Here are some surprising facts brought out by the test:

1.More than one out of three drivers did not know that a blinking red light means a full stop.

2.Three out of ten drivers did not know that an octagonal(eight-sided)sign means stop.

3.More than two out of three drivers did not know what to do when being“tailgated(追尾)”.

The answer:slow down,drive to the right,and let the driver behind pass.

The results of the test were turned over to the National Safety Council(委员会).They will help future safety planning.

小题1:The author’s purpose is to_________.

A.prove that men are better drivers than women

B.give you safe driving directions

C.tell you the results of a national drivers’ test

D.require you to get an education小题2:From the information in this article,which of the following is TRUE?

A.Older drivers are better informed than younger drivers.

B.Experience makes a difference among drivers.

C.Most drivers failed the test.

D.Most people don’ t know what a blinking red light means.小题3:The test covered the following areas about drivers except_________.

A.education

B.years of driving experience

C.sex

D.health小题4:Which of the following as a group was rated“poorly informed”by the judges?

A.Men.

B.High school graduated drivers.

C.Drivers from 27-45 years of age.

D.Drivers with 3 or more years of experience.

题型:单项选择题

如果发现网络变得很慢,经过观察,发现网络冲突增加很多,那么以下哪种情况不会引起此类故障?()

A、有网卡工作不正常

B、电缆太长

C、电缆断路

D、网络流量增大

题型:单项选择题

( )应当对本单位的会计工作和会计资料的真实性、完整性负责。

A.审计人员

B.会计机构负责人

C.总会计师

D.单位负责人

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