问题 选择题

下列现象的微观解释中,错误的是(  )

A.氢气和液氢都可做燃料───相同物质的分子,其化学性质相同

B.“墙内开花墙外香”───分子在不断的运动

C.蔗糖放入水中消失是由于蔗糖分子分解了

D.水壶中的水烧开沸腾后,壶盖被顶起,水分子的间隙增大

答案

A、氢气和液氢都可做燃料是因为它们是由氢分子构成的,同种物质的分子性质相同,故选项解释正确.

B、墙内开花墙外香,是因为花香中含有的分子是在不断运动的,向四周扩散,使人们闻到花香,故选项解释正确.

C、蔗糖放入水中消失是由于蔗糖分子是在不断的运动的,故选项解释错误.

D、水壶中的水烧开沸腾后,壶盖被顶起,是因为温度升高,水分子的间隙增大,故选项解释正确.

故选C.

阅读理解

第三部分:阅读理解(共20小题;每小题2分,满分40分)

阅读下列短文,从各篇短文后所给各题的四个选项(A、B、C和D)中,选出最佳选项。

A

Simona lives in Bucharest, Romania. She is nine years old and HIV positive. When Simona’s mother found out about her illness five years ago, her first reaction was to tell everyone, looking for support.

“That’s when I found out who really was my friend, and who wasn’t, ”she said.“Quite a few people stopped visiting me and asked their children not to play with Simona any more.Because of this, quarrels began in my family with each trouble brought about by her diagnosis. My husband became more and more unfriendly toward me and toward Simona. He didn’t understand how important it was for Simona to receive regular examinations by a doctor or why she needed proper treatment for her sickness.”

When her mother tried to enroll(登记) Simona in a school, the teacher warned her that when other parents found out about her illness she would be shunned by the other children.

Simona’s mother looked for help and found a social worker from the Community Resource Center. The social worker helped her enroll Simona in another school and provided emotional, financial, and material support for the family. Simona’s parents were able to ease the tension(紧张)in the family. Her mother also now attends parenting classes and support groups at the Center.

The Community Resource Center provides not only many needed resources, but also a place where women can gain skills and self-confidence. It provides children with a place where they are accepted. At the Center parents and children find a place where they can grow and find the support they need to stay together and care for each other.

51.Many people prevented their children playing with Simona because___________.

A.she had no true friends                        B.she was a naughty girl

C.she lived with HIV                                 D.she had a strange character

52.Simona’s father thought that Simona____________.

A.shouldn’t bring so much trouble to them

B.should receive examinations regularly by a doctor

C.shouldn’t see the doctor for her sickness

D.should be treated properly for her sickness

53.Which of the following is NOT true according to this passage?

A.Simona has been living with HIV for five years.

B.Few people visited Simona’s mother because of Simona’s illness.

C.Simona’s mother received help from a social worker.

D. Simona was admitted immediately by the first school.

54.From the last paragraph we can draw a conclusion that____________.

A.all the children at the Center are strong and healthy

B.Simona’s mother learned little knowledge at the Center

C.children at the Center are very friendly to each other

D.women at the Center learn to accept each other

单项选择题