问题 填空题

在下图中A、B、C、D、E、F分别表示一种物态变化,物体发生其中__________(填符号)的物态变化时都会吸热。物态变化中在生活中有很多利用,___________________(举一例子)就是对它的应用。

答案

ACE;干冰升华吸热制冷(衣服箱子中的樟脑丸变小等均可)

题目分析:物质由气态直接变为固态叫凝华,物质由固态直接变为气态叫升华;由气态变为液态叫液化,由液态变为气态叫汽化;由固态变为液态叫熔化,由液态变为固态叫凝固.六种物态变化过程中,都伴随着吸热或放热;其中放出热量的物态变化有:凝固、液化、凝华;吸热的有:熔化、汽化、升华.A是由固态变为液态,即是熔化,是吸热的;B是由液态变为固态,即是凝固,是放热的;C是由液态变为气态,即是汽化,是吸热的;D是由气态变为液态,即是液化,是放热的;E是由固态直接变为气态,即是升华,是吸热的,F是由气态直接变为固态,即是凝华,是放热的.物态变化中在生活中有很多利用,如干冰升华吸热制冷、衣服箱子中的樟脑球变小等都是升华的应用.故答案为:ACE;干冰升华吸热制冷(衣服箱子中的樟脑丸变小等均可).

完形填空

This story happened when I was 11 years old. I’ll never forget it.

I was at my friend Jenny’s      after school one day. We were doing homework when a friend of Jenny’s mum’s came over to      . I don’t remember her name or even what she looked like. I      remember her hands, her voice and the lesson she taught me.

I remember her hand reaching out for mine. What     hands she had, I thought; rich, dark skin going well with the orange nail polish (指甲油). Then I heard her saying, “Oh no, that is NOT      you shake hands. Let me show you.”

After that, I just remember her voice explaining the importance of a good       , having a sense of self, looking the other person in the eye… At that moment I felt respected.

I think of her every time I meet someone      . I’m so thankful for her little lesson.

I thank her for       the time to teach me something I didn’t know. I thank her for the       that she didn’t talk down to me because I was 11 or because I didn’t       something. I thank her for instilling (灌输) the idea that if someone doesn’t know something, don’t be afraid to share your knowledge.

小题1:

A.kitchen

B.office

C.classroom

D.house小题2:

A.watch

B.help

C.visit

D.look小题3:

A.just

B.still

C.also

D.hardly小题4:

A.dirty

B.beautiful

C.large

D.useful小题5:

A.why

B.when

C.where

D.how小题6:

A.handshake

B.experience

C.education

D.impression小题7:

A.familiar

B.new

C.special

D.big小题8:

A.saving

B.checking

C.taking

D.changing小题9:

A.truth

B.news

C.result

D.fact小题10:

A.like

B.know

C.tell

D.want

单项选择题