问题 选择题

为了探究水电解的微观过程,某同学做了一些下图所示的分子、原子的模型,若用“”表示氢原子,用“”表示氧原子,其中能保持氢气的化学性质的粒子是

A.

B.

C.

D.

答案

答案:A

氢气是由氢分子构成的,其化学性质是由氢分子保持的.

A、表示的是氢分子,所以正确.

B、表示的是两个单个的氢原子,所以错误.

C、表示的是水分子,所以错误.

D、表示的是单个的氢原子和氧原子,所以错误.

故选A.

阅读理解

One day Mrs Jones goes shopping alone(独自地). When Mr Jones comes home in the evening, she begins to tell him about a beautiful dress. “I see it in a shop this morning,” she says, “and…” “And you want to buy it,” says Mr Jones, “how much is it?” “Fifteen pounds.” Every evening, when Mr Jones comes back from work, his wife goes on talking only about the dress. And at last, after a week, he says, “Oh, buy the dress! Here’s the money!” She is very happy. But the next evening, when Mr Jones comes home and asks, “Have you got the famous(著名的) dress?” She says, “No.” Why not?” he says. “Well, it is still in the window of the shop after a week. I think nobody else wants this dress. So I think it is not a good one!”

小题1:Mrs Jones goes shopping_________ one day.

A.with Mr Jones

B.with her friend

C.by herself

D.with the other woman小题2:Mrs Jones tells Mr Jones about the dress every day because________.

A.it is really beautiful

B.she wants the shop

C.she wants Mr Jones to buy it for her

D.she likes it very much小题3:Mrs Jones is very happy after________.

A.Mr Jones agree(同意) to buy it for her

B.Mr Jones gives her the money for the pants

C.she gets the beautiful dress

D.she sees the dress is still in the shop window小题4:Mr Jones thinks it’s the famous dress because________.

A.it is a beautiful dress

B.it is in the shop window for a week

C.his wife has it

D.his wife talks about it again and again小题5:From the story we can know__________.

A.Mrs Jones is a housewife, she doesn’t have much money

B.Mr Jones doesn’t like his wife

C.Mr Jones comes home for lunch every day

D.Mrs Jones doesn’t like the things if others like them

问答题 简答题