关于单向板与双向板的受力特点，说法不正确的是( )。A．两对边支撑的板是单向板，一

Dear Mr. Black，

I’m very thank to you for inviting me to stay with you in the come summer vacation. I have been dreamed of seeing you again so that I can get help from you in my English learning. And I’m afraid I cannot go to your place in this summer. I’ve promised my grandmother, she lives in the country, to spend this summer with her. She misses me too much that I find difficult to refuse her request. I’m busy preparing for my examinations in present. I planned to visit you in winter if it’s convenient to you.

Best wishes.

Yours truly,

Li Ying

（）的程序性强，是人们用来处理常规化、重复性问题的有力手段。

A.业务规范

B.行为规范

C.技术规范

D.制度规范

       大风呼呼号(hào  háo)叫，鸡毛声声夸耀：“看我不用翅膀，同样飞得很高！”燕子迎面飞来，只是淡淡一笑：“风儿把你带上，有啥值得骄傲！”大风终于停息了，鸡毛跟着落(luò  lào)地，燕子靠着翅膀，却是越飞越高。

1．给画线的字选择正确的读音。 

2．近义词我知道。

     夸耀一一(       )  骄傲——(       ) 

3．鸡毛靠            飞得高，燕子靠             飞得高。 

4．从这个故事中你悟出了什么道理？

A为含三种元素的钠盐，C为相对分子质量为100的白色不溶物，请完成下列问题：

（1）A_________，B_________，C_________．（填写化学式）

（2）D中一定含有的溶质是_________，理由是（用化学方程式表示）_________，_________．

（3）D还可能含有的溶质是_________．

As soon as the exams were over, the students all went their （） ways.

A. homely

B. perspective

C. respective

D. diverted