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问题 单项选择题 配伍题

慢性左心衰竭导致（）

A.肺气肿

B.肺不张

C.肺水肿

D.肺脓肿

E.肺褐色硬化

答案

参考答案：E

解析：急性左心衰时心脏收缩力突然严重减弱，心排血量急剧减少，左室舒张末压迅速升高，肺静脉回流不畅，肺静脉压力快速升高，肺毛细血管压随之升高，使血管内液体渗入到肺间质和肺泡内，形成急性肺水肿

单项选择题

按照国标GB/T6208-1995规定，软钎料的英文字母用( )表示。

A．S

B．B

C．F

D．G
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单项选择题

Congress makes the laws in the United States. It has two parts, which are more or less equal in power. They are known as the House of Representatives and the Senate. The House of Representatives is larger than the Senate whose 100 members (two from each state) serve for six years. The 435 members of the House are elected every two years, and the number from each state is determined by the population of the state. For example, California, which has a large population, has 43 representatives, while the State of Nevada has only one.
The House and Senate are divided into small groups which take care of special matters such as education or foreign affairs. The most important work of Congress is often done in these groups, which are called subcommittees.
According to the Constitution of the United States, a senator must be at least 30 years old and he must have been a citizen of the United States for nine years at the time of his election. To be elected to the House a person must be 25 years old and must have been a United States citizen for seven years. At the present time, members of Congress include businessmen, farmers, teachers, and especially lawyers. In general, senators are better known than representatives because they are fewer in number and serve for a longer time. Many American presidents served in Congress before they became president.

To be elected to the Senate a person must______.

A. be at least 25 years old
B. be at least 30 years old
C. have been a citizen for seven years
D. be a lawyer
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