问题 多项选择题

有关羟丁酸钠的描述下述正确的是()

A.无镇痛作用

B.是一种催眠性静脉麻醉辅助药

C.对呼吸系统无明显影响,很少发生呼吸抑制

D.可使肌肉松弛,能满足腹腔内手术,骨折或脱臼复位手术的需要

E.可使血清钾降低

答案

参考答案:A, B, C, D, E

阅读理解

阅读短文,根据其内容回答问题。

     Nobody knows when or where kite flying began, but there are some stories about the history of kites.

      Early kites may have been simple flat shapes such as leaves. Later, kite designs improved as people

discovered how to put lightweight coverings over frames. Silk and paper are lightweight materials that

were invented in China. China is the earliest known center of kite making. Chinese kites date back (追溯)

at least 2,000 years.

     The first Chinese kites may have been used by armies, perhaps as signals. As time passed, kites took

on other uses. They were flown during special ceremonies and for sport. Then there were kite-flying

holidays, such as the one held on the ninth day of the ninth month. According to legend (传说), that was

the day a family went kite-flying on a hilltop. Returning to their house, they saw that it had collapsed (倒塌). Kite-flying had saved their lives!

     After a while, travelers and traders spread kite-flying from China to Japan. Before long, Japanese kite-

flying took on a new purpose. Kites flew to celebrate happy things and good luck. Soon, kite-flying

reached many other Asian countries. In each land, kites were designed for ceremonies and sport.

     Later, knowledge of kites traveled west, to northern Africa, to Europe, and finally to America. There

may have been early kite inventors in these lands, but their creations did not spread as widely as the kites

of Asia.

1. What shapes did early kites look like?

    ________________________________________________________________

2. What lightweight materials for kites were invented in China?

    ________________________________________________________________

3. Which country is the earliest known center of kite making, China or Japan?

    ________________________________________________________________

4. What were kites used for in China?

    ________________________________________________________________

5. What were kites used for in Japan?

    ________________________________________________________________

单项选择题