问题 选择题

下列实验基本操作正确的是                                         

                          

倾倒液体            过滤           给液体加热             检查装置气密性

A                     B                  C                       D

答案

答案:D

题目分析:A倾倒液体时应将瓶塞倒放在桌面上;B 过滤时应用玻璃棒引流;C 给液体加热时,试管中的液体体积不能超过试管容积的三分之一,否则沸腾时容易冲出试管;D 检查装置气密性时,应用热的手捂住试管,玻璃管放入水槽中,水槽中有气泡出,手拿开后玻璃管中有一段水柱上升说明装置气密性良好。

点评:关于实验室的基本操作属于中考的必考题型,但是可以考的操作比较有限,应注意总结。

阅读理解

书面表达。

Dear Peter,

     Thanks for your last letter. I am happy to know you' had a very great funny vacation. As your best

pen pal, I'd like to tell you how I spent my vacation. I didn't go to school on May 1st and my parents

didn't go to work, so we went to visit Changbaishan. There are many buses to go there. We had a new

car and my mother drove the car there. Changbaishan is really an interesting place. Many people go

there every day. We saw lots of beautiful trees and had lunch under a tall tree. Then we went to Tian

Chi—a fantastic big lake (湖泊)—The water is blue and very clean. But nobody can swim in the water.

It can make it dirty and it is dangerous to swim in it. We took many photos with our camera. At 5: 00

p.m. we went home happily.

                                                                                                                                    Yours,

                                                                                                                                 Wang Qiang

1. Peter and Wang Qiang are ______.     

A. classmates 

B. cousins

C. brothers

D. pen pals

2. When did they go to Changbaishan? 

A. On May 4th.

B. On June l st.

C. On May 1st. 

D. On July 1st.

3. Wang Qiang and his parents ______ to Changbaishan.     

A. took a taxi    

B. took a car

C. took a bus 

D. walked

4. What does the word "drove" mean?     

A. 购买        

B. 推销

C. 讨论             

D. 驾驶

5. Wang Qiang and his parents didn't ______ on Changbaishan. 

A. swim Tian Chi  

B. have lunch

C. see any trees

D. take photos

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