男性，55岁，患慢性肾炎10余年，经中西医结合治疗病情稳定，但近

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问题单项选择题 A2型题

男性，55岁，患慢性肾炎10余年，经中西医结合治疗病情稳定，但近1年来逐渐加重，食欲下降，贫血，化验血肌酐已进入肾衰竭期，这时血肌酐的水平是（）

A.<178μmol／L

B.178～278μmol／L

C.278～450μmol／L

D.450～707μmol／L

E.>707μmol／L

答案

参考答案：D

填空题

短文填空。

What is a library for? Most libraries have books and other things to r 1 . Many of them have things to

listen to. Some libraries even have computers. But very f 2 people would think of a library as a place to live

in.

One library in New York City turned into a home for 250 people for a few days. They slept on the floor.

Why did the people move into the library?

The people moved into the library b 3 the city wanted to close it to save money. These 250 New Yorkers

loved their l 4 . They didn't want to lose it. So they moved in. They knew that the library couldn't be closed

if they were living inside it. At last, the city a 5 to keep the library open, and the people all went home.

单项选择题

分集技术中，主要用于克服频率选择性衰落的技术是（）.

A.空间分集

B.频率分集

C.极化分集