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问题 单项选择题

在麻醉过程中，过度通气可降低颅内压，其生理学基础为

A．动脉血CO2升高使脑血管扩张，颅内压下降
B．动脉血CO2下降使脑血管扩张，颅内压下降
C．动脉血CO2下降使脑血管收缩，颅内压下降
D．动脉血CO2升高使脑血管收缩，颅内压下降
E．动脉血O2分压升高使脑血管收缩，颅内压下降

答案

参考答案：C

解析：动脉血CO2升高使脑血管显著扩张，血流阻力降低，脑血流量增大，颅内压升高。PaCO2降低则有相反的作用。

阅读理解
阅读下面短文和问题，根据短文内容，在相应题号后的横线上写下相关信息(不多于
五个单词)，完成对该问题的回答。答语要结构正确，书写工整，字迹清楚。

1. Cousins
You could say that the alligator and the crocodile are cousins because they belong to the same animal group. The group is called Archosauria (ark-o-SOR-ee-ah). The name means "ruling lizards."
The alligator and the crocodile are alike in many ways. Both have hard, bumpy skin. Both lay eggs in nests that they build near water. Both are reptiles (爬行动物), too.

2. Look Again
Even though alligators and crocodiles are similar, there are ways to tell them apart. Adult alligators are usually gray or black, and they are darker than crocodiles. Adult crocodiles may be tan, green, or brown. Most types of alligators have broad snouts. Crocodiles' snouts are different. Their snouts are long and narrow.
Look at the picture of the alligator. Whenever an alligator closes its mouth, only the top teeth show. Now look at the picture of the crocodile. Do you see a difference? Whenever a crocodile closes its mouth, some of the lower teeth also show.

3     
Alligators and crocodile also have different ways of doing things. Alligators like freshwater. They sometimes wander into salty seawater, but they don't stay in the water very long. The salt can be bad for them. Alligators usually make their nests at the edge of freshwater lakes, rivers, or swamps. They use grass and leaves to make their nests. Crocodiles, on the other hand, usually build their nests in mud or sand. Sometimes they construct these nests near salty water. The salty water doesn't hurt them.
Alligators and crocodiles do other things differently, too. A mother alligator stays near her nest. When the eggs hatch, she carries the babies to water. They may even ride around on her head as she swims. They depend on her to help them stay safe. Crocodile babies don't rely as much on their mothers. In fact, the babies leave the nest a few days after they are born.
小题1:Where do they (alligators and crocodiles) lay eggs?
小题2:According to Part 2 "Look Again", how can we tell alligators and crocodiles apart?
小题3:What might be a suitable heading for Part 3?
小题4:According to the passage, who rely more on their mothers?
小题5:Who is the passage most likely intended for?
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多项选择题

员工甄选工具主要包括（）。

A.面试

B.评价中心

C.心理测试

D.工作样本

E.知识测试
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