问题 单项选择题

下列原因可造成血尿素含量增高,但不包括

A.急性黄色肝萎缩
B.休克
C.慢性肾小球肾炎
D.泌 * * 严重梗阻
E.剧烈呕吐或腹泻

答案

参考答案:A

解析: 尿素为体内蛋白质的终末小分子代谢产物,尿素主要在肝脏合成,通过肾脏排出。血容量不足,会影响尿素从肾小球滤过,并且血容量不足可促进抗利尿激素分泌,增加原尿中尿素重吸收,显著升高血尿素。休克(肾脏灌注减少),慢性肾小球肾炎及泌 * * 严重梗阻,导致尿素经肾脏滤过减少或排出受阻,血尿素含量增高;剧烈呕吐或腹泻使血容量减少,造成血尿素含量增高;急性黄色肝萎缩肝功能受损,尿素的合成减少。

阅读理解

Mount Everest is the highest mountain in the world. It is in the Himalayan Mountains between Nepal and China, and it is 8 900 meters high. Sir Edmund Hillary from New Zealand and Tenzing Norgay from Nepal were the first people ever to climb Mount Everest. They climbed it in 1953. Men from several different countries climbed it after that.

Jumko Tabei, a Japanese from Hokkaido, was the first woman to make this difficult climb. A Tokyo newspaper television organized the climb in 1975. They chose fifteen women from mountaineering (登山) clubs to go to Nepal. The group climbed for several days. Then there was an avalanche (雪崩). The heavy ice and snow injured ten of the women. They had to stop climbing, the other five women continued.

Only Ms. Tabei was able to climbing the last 70 meters. She was standing on the top of the world. She was the first woman there.

Ms. Tabei was 35 years old at the time. She is 1 meter 50 centimeters and weighs 42 kilograms. She says that she is an ordinary housewife. She started climbing mountains in 1960. She climbed every mountain in Japan. Then she climbed Mount Annapurna, another high mountain in the Himalayas. Finally she climbed the world’s highest mountain.

When she reached the top, she thought, “I’m at the top and I’m glad that I’m at the top.” Then she climbed back down the mountain.

1. Ms. Tabei was great because _________.

A. she was the first one ever to climb Mount Everest

B. she had climbed every mountain in Japan

C. she was the first woman that climbed the world’s highest mountain

D. she had climbed many mountains though she was small and young

2. “The heavy ice and snow injured ten of the women.” The word “injured” means ________.

A. killed       B. hurt     C. buried      D. froze

3. Which of the following is true?

A.None of the group reached the top of Mount Everest.

B. Ms. Tabei was one of the other five women who reached the top of Mount Everest.

C. The other five women reached the top of Mount Everest but Ms. Tabei was the first one.

D. Ms. Tabei was the only one of the group who reached the top of Mount Everest.

4. Ms. Tabei had practiced climbing for _________ years.

A. fifteen     B. twenty-two      C. thirteen   D. ten

5.What’s the main idea of the passage ?

A. The highest mountain in  the world.

B. The first woman to set foot on the highest mountain in the world.

C. How to climb the highest mountain in the world.

D. The exploration to the highest mountain in the world.

单项选择题