可用（）包装31%盐酸A、铁桶 B、木桶 C、陶瓷桶 D、塑料桶

长江之歌》中唱道：“你从雪山走来，春潮是你的风采；你向东海奔去，惊涛是你的气概……”下列能够说明中 * * 的祖先在长江流域繁衍生息的农耕时代的文化遗址是（  ）

A．河姆渡遗址

B．半坡遗址

C．元谋人遗址

D．北京人遗址

阅读理解。

Dear Mr & Mrs Miller,

      This semester, Ricky can do better in self-control (自我控制) but he is not always in the way we want

him to. I think more care will help him out of his difficulties. Ricky has an excellent mind (头脑), but it is

hard for him to do his work for a long time. However, he seems to be better now.

     Ricky is able to do his homework very well. He reads very well, sometimes too fast. He spells very

carefully and uses the words correctly (正确地) in his homework. He can also work out the math problems

quite easily.

     Ricky is very interested in science. He enjoys reading library books and writing reports about many of

them in an interesting way.

     I enjoy having Ricky in my class. He is going to study in Grade Three next semester. Miss King will be

his teacher.

                                                                                                                  Sincerely yours,

                                                                                                                   Cindy Brown

                                                                                                                 Second-grade teacher

1. This letter is for ______.

A. Ricky Miller

B. Ricky's parents

C. Cindy Brown

D. Miss King

2. What did Ricky's teacher say about his self-control?

A. He did very well in self-control.

B. He had lots of problems in self-control.

C. He did better in self-control than before.

D. He did worst in self-control.

3. What is Ricky good at? 

A. Reading and math.

B. Science and history.

C. Spelling and music.

D. Math and PE.

4. What does Ricky enjoy at school?

A. Working out the math problems.

B. Reading books and writing reports.

C. Doing his homework for a long time.

D. Helping others out of their difficulties.

5. We can learn from the last paragraph that ______.

A. Cindy Brown liked to teach Ricky

B. it was difficult for Cindy Brown to teach Ricky

C. Mrs Miller will teach Ricky next year

D. Ricky is a student of Grade Three now

第一步的急救措施是

A．协助准备剖胸探查术

B．立即封闭胸部伤口

C．协助气管插管

D．准备闭式胸腔引流术

E．建立静脉通路

下列属于有毒污染物直接或间接被生物摄入体内后引起的是( )。

A．遗传异变

B．生理机能失常

C．后代发病

D．机体变形

盐渍保存法中食盐用量应当有效的控制在（）

A、1%-5%

B、5%-10%

C、10%-20%

D、20%-30%