在化学反应中，某元素由化合态变为单质，则该元素 A．一定被氧化 B．一定被还原

句型转换 ( 10分)

1. Did you have a good time with your classmates for the weekend ?

Did you ____________ _____________ with your classmates for the weekend ?

2. Obviously, he has made great progress in English.

_______ _______ __________ that he has made great progress in English.

3. They built a statue to honour the famous leader.

A statue was built _________ __________ _________ the famous leader.

4. May I have your permission to open the door ?

Would you _____________ me ____________ open the door ?

5. The day I had been expecting came at last.

The day I ________ ___________ _________ came at last.

一个游泳池长25米，小亮游了3个来回，他共游了______米．

以下哪些是质量体系建立和实施所用的主要文件：（）.

A．质量手册

B．质量计划

C．以上都是

D．以上都不是

最有助于鉴别慢性肾炎与高血压肾损害的检查是（）

A.血压监测

B.尿常规

C.肾功能

D.肾穿刺检查

E.尿培养

在一个测量列中，测量值与他们的算术平均值之差叫极差。