群钻是在麻花钻上修磨横刃使横刃缩短为原来1/5～1/7。

改写句子  按照括号中的要求完成改写后的句子，每个空格填一个单词。（5分）

小题1:Did he break the window yesterday? (改被动语态)

__________ the window __________ by him yesterday?

小题2:“How long will you be there?” she asked. (改为间接引语)

She asked me how long __________ __________ be there.

小题3:He will succeed in his scientific research. I’m sure.（合并为一句）

I’m sure __________ his __________ in his scientific research.

小题4:Jim won the first prize in the competition three years ago.（划线提问）

When __________ Jim __________ the first prize in the competition?

小题5:Hurry up, or you’ll miss the bus. (同义句)

__________ you __________ hurry up, you’ll miss the bus.

在设备维护工作中，任何时候接触单板都要戴（），不能用手触摸印刷电路板。

词形变换：根据句意，写出所给单词的适当形式。

1. My classmates are from six ________ (country).

2. Danny and Jenny often go for a ________ (walk) after supper every day.

3. An airplane is ________ (fast) than a bus.

4. Laughing ________ (loud) is good for your health.

5. I can see some girls __________ (play) on the square.

6. "Where ________ (be) you yesterday?" "I was in the library."

7. Look! Jenny is ________ (look) out of the window of the train.

8. The ________ (child) are packing their suitcases. They are going to Beijing.

9. My father ________ (go) to the factory from Monday to Friday.

10. Danny ________ (break) his tail at the Palace Museum last week.

关于SARS临床表现的叙述，错误的是（）。

A.常以发热为首发和主要症状

B.严重者出现呼吸窘迫

C.肺部体征不明显

D.常伴有呼吸道卡他症状

E.部分患者有腹泻

简单命题：不包含其他命题的命题，只能把它分析为不同的词项，不能再把它分析为其他命题。因此又叫作“原子命题”。下列哪项不是简单命题

A．小明和小红是朋友

B．生命在于运动

C．掷骰子4点朝上的概率是1/6

D．小张既高且胖