活塞式压缩机发生撞缸有哪些原因？

一个圆柱的体积是180cm³，与它等底等高的圆锥体积是（    ） cm³；如果一个圆锥的体积是180cm³，与它等底等高的圆柱的体积比它大 （    ） cm³。

根据所给的汉语提示，转换下列句型 。

1. What is the matter with you? He asked me.  (改为复合句)    

He asked me            the matter with me.

2. We told him to write to us soon.  (改为被动语态)    

He            to write to us soon.

3. I hurt my knee badly.  (改为被动语态)    

My knee            badly by me.

4. Teachers make students do lots of homework.(改为被动语态)  

Students are            do lots of homework.

5. While she was eating lunch, it happened.(改为同义句)   

 _____   it happened, she was _____ lunch.

乳癌最易发生于乳腺的内上象限。

We had a marvelous holiday: only the last two days were slightly _____ by the weather.

A．damaged

B．hurt

C．ruined

D．spoiled

实施专项检测的项目主要包括( )。

A．地基基础工程检测

B．主体结构工程现场检测

C．建筑幕墙工程检测

D．水泥物理力学性能检验

E．钢结构工程检测