如图：一根粗细均匀的杠杆AB，以其中点O为转轴，在AO的中间C放上两枝蜡烛（粗细

单词拼写：根据句意和所给首字母提示完成句中所缺单词。

1. We've made great p__________ in solving the problem of air pollution recently.

2. All parents hope their children can receive the best e__________.

3. My e__________ sister is three years older than me.

4. You need a lot of t__________ in listening, speaking, reading and writing if you want to improve your English.

5. With the d__________ of our society, our life is getting better and better.

6. Who can describe the changes in d__________ that have taken place in our city?

7. U_________ anyone has anything else to say, the meeting is closed.

8. I don't go to play much n__________ because I'm too busy.

9. It is important that we should be f__________ with each other.

青白散2功效与作用

油区内一切电气设备的维修，都必须（）进行。

A.经领导同意；

B.由熟悉人员；

C.办理工作票；

D.停电。

乙将股份转让给丁( )。

A．须经股东会全体股东的一致同意

B．须经全体股东的过半数同意

C．须经全体股东所持表决权的2/3以上通过

D．只需通知其它股东

纤维素细胞壁遇（）显蓝色或紫色；菊糖遇（）显紫红色。