问题 选择题
学校高中部共有学生2100名,高中部各年级男、女生人数如右表,已知在高中部学生中随机抽取1名学生,抽到高三年级女生的概率是0.2,现用分层抽样的方法在高中部抽取60名学生,则应在高二年级抽取的学生人数为(  )
高一级高二级高三级
女生373yX
男生327z420
A.24B.18C.16D.12
答案

根据题意,在全校学生中随机抽取1名,抽到高三年级女生的概率是0.2,

可得

x
2100
=0.2,解可得x=420.

则高二年级人数为y+z=2100-(373+327+420+420)=560,

现用分层抽样的方法在全校抽取60名学生,

应在高二年级抽取的人数为

60
2100
×560=16;

故选C.

阅读理解

Dear Mr Zhu,

I am writing to your magazine’s “Teenagers Now” column(专栏) to ask for some help with my 16-year-old son. At the moment, he refuses to do almost everything his mother and I ask him to do. He is our only child and we treat him very well. His grandparents buy him many things, and yet he is still rude to us. He refuses to spend time with us or do as we tell him. Sometimes he acts as if he doesn’t even love us at all.

Now he refuses to do his homework, and instead insists on wasting his time watching DVDs and listening to foreign music. I cannot understand this music, but I don’t like it. He also spends too much time in Internet cafes, where he either plays games or chats online. He is wasting valuable time during this important period in his life!

What am I to do? At present, to prevent making his mother unhappy with an argument, I am allowing him his freedom. However, I am worried that if I keep allowing him to do what he wants, he may fail at school, or worse.

How can I help my son without harming our relationship?

Yours,

Liu Zhenhua

小题1:What’s Mr. Zhu’s job?

A.A teacher.

B.A magazine columnist.

C.A youth worker.

D.A doctor.小题2:From the passage, we can know that Mr. Liu’s son is _______ to his parents.

A.friendly

B.thankful

C.polite

D.rude小题3:What does Liu Zhenhua write to Mr. Zhu for?

A.To blame his son.

B.To ask for help with his son.

C.To say something about his son.

D.To complain to him about his son.小题4:Mr. Liu’s son always spends his time _______.

A.doing his homework

B.playing games online

C.chatting with his parents

D.doing everything his parents ask him to do小题5:What do you think is the possible answer for the father?

A.The father should let the son alone.

B.The father should give his son a beating.

C.The father should allow his son his freedom.

D.The father should be patient enough to have communication with the son.

问答题 简答题