问题 选择题

下列说法错误的是( )

A 臭氧可使湿润的KI淀粉试纸变蓝

B 石英玻璃是以纯碱、石灰石和石英为原料制成的

C 用渗析法可分离淀粉胶体和碘化钾溶液的混合物

D 氯化亚铁溶液久置于空气中因被氧化而呈黄色

答案

答案:B

A 说法正确 臭氧的强氧化性使之遇湿润的碘化钾有碘生成,碘与淀粉变蓝;

B 说法错误 石英玻璃的成分就是石英;

C说法正确

D 说法正确

阅读理解

What will the future be like? What do you think of it? Here are some answers from some students.

Roy Burns: I think life in the future will be better. Most people in the world will use “green cars” by 2020, so there will be less pollution and people will live to be 200 years old. As for space travel, I would say, we will travel to Mars(火星) and some other stars in about fifty years.

Helen Lester: If we don’t take good care of the earth now, our children and grandchildren will be born into a world with too much pollution. There will be fewer trees and more buildings, because there will be more people.

Kitty Smith: I agree with Helen Lester. Things will be worse. The weather in the future will be much hotter. Human beings will have to look for another planet to live on.

小题1:What are the students doing?

A.They are talking about space travel.

B.They are predicting the future.

C.They are talking about pollution.

D.They are predicting the weather in the future.小题2:How many things does Roy Burns predict?

A.Two

B.Three

C.Five

D.Six小题3:What does Helen Lester think life will be like in the future?

A.People will live much longer.

B.People will have to live on the moon.

C.Everybody will drive a green car.

D.There will be more buildings and fewer trees.小题4:What does the underlined word “planet” mean in Chinese?

A.太空站

B.宇宙

C.星球

D.南极小题5:Why does Kitty Smith think human beings will have to live on another planet?

A.The earth will be too crowded for human beings to live on.

B.There will be too much pollution everywhere.

C.There will be too many people.

D.The earth will be too hot to live on.

填空题