低分子右旋糖酐的主要作用是 A．降低血液黏稠度，改善微循环 B．提高血浆胶体渗透压

全班50名同学在体育达标测验中有1人未达标，达标率是99%．______．

同义句转换。

1. The radio went wrong yesterday.

    ____________________________________

2. They were injured in the accident.

    ____________________________________

3. He can't memorize all the words in 20 minutes.

    ____________________________________

4. You can watch TV after finishing your homework.

   ____________________________________

5. Unless you keep ice cream in a fridge, it melts.

   ____________________________________

涡旋压缩机同活塞式压缩机相比具有（）特点。

A.体积大

B.重量重

C.效率高

D.噪声高

弥漫性钙质沉着症（）

A.女性多于男性，小儿及青少年多见

B.30岁左右成年人多见

C.青少年男性多见

D.老年人多见

E.婴幼儿多见

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