问题 实验题

实验室制取气体的装置下图所示,根据所学的知识回答下列问题。

(1)图中标有①、②的仪器名称:①       ;②       

(2)写出用装置A制氧气的一个化学方程式                           ,小明用D装置收集氧气的依据是________________________________________; 

(3) 实验室可选用图中                               (填标号)组装一套制取二氧化碳的装置。用化学方程式表示检验二氧化碳的方法:____________________                       ,检验二氧化碳集满的方法是              

                               

(4)有毒气体常用密封的装置收集。小芳用F装置收集SO2,她应将气体从_____     进。

答案

(1)①长颈漏斗 ②集气瓶

(2)2KMnO4K2MnO4+MnO2+O2↑ 

     氧气不易溶于水

(3)B;C

     CO2 +Ca(OH)2=== CaCO3↓+ H2O

     用燃着的木条放在瓶口,若木条立即熄灭,证明集满

(4)④

阅读理解

It's the end of class. When the bell rings, students of Luohu Foreign

Languages School in Shenzhen quickly take out their cell phones.

They want to log on to their micro blogs to check the interesting things that have happened in the last hour.

Since last year, the trend (潮流) of micro blogging has swept the country. Recent surveys shows that most students in middle schools have a micro blog and some even update their blogs over five times per day.

"We learn many fresh and interesting things on micro blogs and they have become popular topics in class," said Andy Liang, 14. "If you do not know about them, you are out of the loop."

It is also a great place for students to let out stress. "My parents always ask me to study hard, and encourage me before exams, but it really adds pressure," said Simon Zhang, 15. "When I share these feelings on my micro blog, I get many replies from friends in the same situation, which makes me feel better."

But parents are worried that micro blogging could be a waste of time. Some misleading messages may even cause danger to kids, they said.

Mr. Shen, a professor at the China Education Association, suggests parents not worry too much as long as kids are not crazy about micro blogging. Maybe it can become a window for parents to understand their children.

"If parents can read their children's micro blogs, they'll know their thoughts, thus leading to better communication and solutions to problems," he said. He also gives some tips for kids.

-Don't micro blog for more than one hour a day.

-Never micro blog in class.

-Try to talk face to face with people from time to time.

-Be critical(批判性的). Don't trust all the messages on a micro blog.

小题1:Andy Liang thinks students are out of the loop if they don't know.

A.the latest films

B.the famous pop song singers

C.the popular topics in class

D.many flesh things on TV小题2:Micro blog made Simon when he shared his feelings and got replies on his micro biog.

A.feel sad

B.let out stress

C.add stress

D.make friends小题3:We can know from Mr. Shen that micro blogging can           .

A.make kids crazy while logging on to it

B.bring a lot of misleading messages

C.become a window to understand young kids

D.lead to worse communication小题4:Which statement is TRUE according to the passage?

A.It's good for kids to micro blog for more than one hour a day.

B.Kids should trust all the messages on a micro blog because they are useful.

C.The trend of micro blogging has swept the country since five years ago.

D.Kids should try to talk face to face with people, not just micro blogging.

单项选择题