问题 单项选择题

某市2004年煤的使用量为3000t,煤中硫的含量为3%,其中15%的硫留在燃烧的残渣中,根据空气质量控制的要求,2010年SO2的排放量为90t,则平均每年减排SO2的量( )。

A.15t
B.9t
C.7.5t
D.10.5t

答案

参考答案:D

解析: 2004年SO2的排放量=3000×3%×(1-15%)×(64/32)=153t,至 2010年需减少153-90=63t,故平均每年减排SO2的量=63/6=10.5t。

阅读理解

Every year there is the Spring Festival in China. Usually it is in January or February. It’s the most important festival in China. So before it comes, everyone has to prepare things. They buy beef, pork, chicken, fruit and many other things. And they often make a special kind of food called “dumplings”. It means “come together” in Chinese. On the day before the festival, parents buy new clothes for their children and children also buy presents for their parents. On the festival eve, all the family members come back to their home. This is a happy moment. They sing, dance and play cards. When they enjoy the meal, they give each other the best wishes for the coming year.

They all have a good time.

根据短文内容,选择正确答案。(5分)

小题1:Which is the most important festival in China?          .

A.Mid-autumn Festival

B.Spring Festival

C.Children’s Day

D.May Day小题2:The Chinese usually have their Spring Festival in         .

A.January or February

B.February or March

C.September or October

D.December or January小题3: What’s the special kind of food for the Spring Festival in China?  .

A.Pork

B.Fish

C.Dumplings

D.Noodles小题4: The food “dumplings” mean “          ”.

A.be delicious

B.be hungry

C.come together

D.come back小题5: When they are having dinner on the festival eve, the Chinese       

A.sing, dance and play cards

B.buy each other presents

C.never drinks

D.give each other the best wishes

单项选择题 共用题干题