问题 选择题

除去密闭容器空气中的氧气,若用燃烧的方法除去,但又不引入其它气体杂质,可使用的物质是(  )

A.硫磺

B.木炭

C.红磷

D.细铁丝

答案

A、硫磺和氧气反应生成气体二氧化硫; 增加了气体杂质;故此选项错误.

B、木炭和氧气燃烧生成气体二氧化碳,增加了气体杂质; 故此选项错误.

C、磷和氧气生成五氧化二磷,为固体,不会增加气体杂质;故此选项正确

D、铁丝和纯氧气生成四氧化三铁固体,铁丝在空气里是不会燃烧的.故此选项错误.

故选C.

阅读理解

阅读理解。

    There are many TV shows about young people and their problems. We ask two youngsters, Rita

and Meg, about their favorite series and its main character.

    Rita: I think that my favorite series at the moment is Get Real. It's about an American family with two

sons and a daughter. The daughter's name is Megan. I like her character very much. She is l7 years old.

She has got long, dark brown hair and dark brown eyes. She is quite hard-working but she doesn't have

plans to study at university. She hasn't got many friends because she is quite shy. I like the series because

it is about real problems in the life of young people. At first it looks like a comedy but then it changes into

a real drama.

    Meg: I must say I prefer comedies to dramas. My favorite TV series is Gilmore Girls. There are two

main characters, a single mother and her daughter, a l 7-year-old girl called Rory. She is not very tall and

has got long brown hair. Rory is a very good student and an ambitious (有雄心的) person. She always

reads books and works very hard. She hasn't got many friends because she is now in a new school. Rory

is quiet and not very outgoing,but her mother is a real rebel (叛逆的人). I sometimes think that Rory is a

kind of parent and her mother is a little girl!

1.Which TV series does Rita like?[ ]

A.The one about two American teenagers.

B.The one about a family with small children.

C.The one about a girl and her family.

D.The one about Megan and her friends.

2.Which of the following about Megan is NOT true? [ ]

A.She doesn't like to work very hard

B.She doesn't want to go to university.

C.There are not many friends in her life.

D.She isn't very outgoing.

3.What is special about Get Real? [ ]

A.It's about an American family.

B.It is only about young people.

C.It is very optimistic (乐观的).

D.It shows the real life of young people.

4.What do the two movies Gilmore Girls and Get Real have in common? [ ]

A.They are both about serious problems.

B.They are both about a teenage girl.

C.They both have two main characters.

D.They both have one parent in the family.

5.What do you think of Rory and her mother? [ ]

A.They prefer to be alone.

B.They are not very romantic.

C.They are different kinds of people.

D.They love and hate similar things.

判断题