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问题 问答题

化学为人类社会的可持续发展做出了巨大贡献．

（1）家用太阳能发电设备与太阳能热水器一样，只要将一个太阳能板放在楼顶，就能通过太阳能给家里发电．从化学角度看，太阳能作为新能源的主要优点有（答两点）：①______②______．

（2）氢气是未来的理想能源，可以作为化工生产的重要原料，也可以作航天工业的高能燃料，其燃烧的化学方程式是______．

答案

（1）太阳能是一种新型的能源，越来越被广泛利用．它的优点很多，比如：太阳能分布广阔，获取方便；清洁不会造成环境污染；

（2）氢气燃烧生成水，燃烧的化学方程式是2H2+O2

 点燃 
.
 
2H2O．

故本题答案为：（1）①太阳能分布广阔，获取方便；②清洁不会造成环境污染；

（2）2H2+O2

 点燃 
.
 
2H2O．

阅读理解
On the first day of class, Roni’s foreign students fill out form and give information about themselves.
Name: Claude Ansari                           Country: France
Native Language: Arabic                       Time in U.S.: 10 months
Please tell me a little about yourself.
Family: I live with my wife and 2-year-old daughter.
Work: I was an art school student in France. But now, I’m working as a cook.
Interests: I love to cook (and eat). I also like to go mountain climbing.
 
Name: Su Chen Wang                           Country: Taiwan, China
Native Language: Chinese                        Time in U.S.: 4 years
Please tell me a little about yourself.
Family: I have 3 boys and 2 girls. They’re all attending school here.
My husband is a businessman and lives in Taiwan.
Work: I was a maths teacher but now I’m a housewife.
Interests: I like indoor activities: reading, drawing, listening to music.
 
Name: Rorma Ruiz                          Country: Guatemala
Native Language: Spanish                     Time in U.S.: 2 years
Please tell me a little about yourself.
Family: My family—my mother and 4 brothers—lives in Guatemala. I’m here by myself.
Work: I worked as a nurse in my country. Here I’m a tailor.
Interests: I like to go to movies and buy videos. I love to study.
小题1:Who has lived in America for the shortest time?
A. Claude Ansari  B. Norma’s mother.   C. Su Chen Wang
小题2:__________worked in a hospital a few years ago.
A. Claude Ansari   B. Su Chen Wang      C. Norma Ruiz
小题3:Su Chen Wang’s children are attending school in ___________.
A. France         B. the U.S.          C. Taiwan
小题4:These three people will ___________ together.
A. go mountain climbing   B.listen to music    C. study in the same class
小题5:Which of the following is Not True?
A. They all had jobs before they came to America?
B. They all have children.
C. They are foreign students of a school in America now.
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单项选择题

螺杆泵由于凹槽空间大，有少量（）也不妨碍工作。

A.气体

B.杂质颗粒

C.高粘度液体

D.低粘度液体
查看答案