5．对于函数，下列描述正确的是　　　　　　　　　　　 　　　　　　　　 (　　 )

　　　 A．函数的增区间是 　　 B．函数的增区间是　　

　　　 C．函数的减区间是 　　 D．函数的减区间是

4．已知，，若，则实数的值为(　　 )

　　　 A．　　　　　 　 B．　　　　 　　 C．　 　　　　　　 D．

3．函数的定义域为　　　　　　　　　　　　　　　　 　　　　　　　 (　　 )

　　　 A．　　 　　　　 B．　 　　　　　 C．D．

2．已知函数，那么下列各式中不可能成立的是为　　 (　　 )　

　　　 A．　　　　 　　　 B．　

　　　 C．　　　　　　 　　　 D．

只有一个是正确的，把答案序号填在答题纸对应表格内)

1．设全集，，则 　　　　　　 (　　 )

　　　 A．　　　 　　　　 B．　　　 　　　　 C．　　　 　　 D．

　　 Helen is an Australian woman. She has lived and worked in Beijing for five years. She loves

China. She says China is beautiful and Chinese people are friendly.

　　 Last August when she was traveling by train from Beijing to Qingdao, she saw something that made her unhappy. Some travelers threw litter on the floor, even out of an open window. Though she said nothing to them, she felt very disappointed. She really wishes all the people could care about the environment. If so, the world will become more and more beautiful.

2009-2010学年第一学期期中试卷

Today is Saturday and it is cloudy. My classmates and I walked to the park nearby to take part in an activity. There were three groups of us, and I was in Group Three. After we got there, we began to work at once. The students in Group One watered flowers. The students in Group Two picked up rubbish and collected waste paper and other things for recycling. Our group cleaned the chairs in the park. We worked very hard. After we finished all the work, we all felt very tired. But we had a very happy day, because we did something useful to keep our city clean and tidy.

W: Hi, Jack. Nice to see you.

M: Nice to see you, too.

W: How long have you been in London?

M: Oh, only a few days. We came here by air four days ago, and I’m sorry to say that we have to return in three days.

W: Is this your first visit?

M: It’s my wife’s first visit, but I have been here five times before. I have to come over once a year on business.

W: And what do you think of London?

M: Oh, I think it’s a wonderful place.

11. W: Could you please tell me something about Chinese teenagers in the past?

M: Sure. My grandpa told me that life was hard in the past.

12. M: Have you done your homework yet, Kate?

W: Yes, I finished it two hours ago.

13. W: Oh, what terrible noise!

M: I’m sorry for making so much noise.

14. W: I have recycled five cans. What about you, Jim?

M: Two more than you.

15. W: What should we do to reuse the old clothes?

　 M: We should post them to Project Hope.

1. There are more ring roads in Beijing nowadays than before.

2. Because of our country’s one-child policy, most families now have only one child.

3. The government provides homeless children with nice living places.

4. Every year people pour a lot of waste water into rivers and lakes.

5. The teachers in our school encourage students to collect waste paper and soft drink cans.