2. (广东卷理5)“”是“一元二次方程”有实数解“的

A．充分非必要条件　　　　　　　　 B.充分必要条件

C．必要非充分条件　　　　　　　　 D.非充分必要条件

A．由知，．

1. (福建卷文12)设非空集合满足：当时，有。给出如下三个命题：①若，则；②若，则；③若，则。其中正确命题的个数是

　 A.0　　　　　　 B.1　　　　 　　　　C.2　　　　　　　 　　D.3

[答案]D

[解析]对于①若，则解之可得,故；对于②若，，则解之可得；对于③若，则解之可得，所以正确命题有3个。

[命题意图]本小题考查集合的运算及不等式和不等式组的解法。

10.She said to me, “ I went over my lessons last night.”

　 She told me _________ _________ __________over her lessons the night before.

9.Tom said to me, “ Do you like football?”

　 Tom asked me _______ _________ _________football

8.He asked, “ Can I borrow your bike?”

　 He asked _______ ________ ________ borrow my bike

7.Mother said to me, “What are you doing in the room?”

Mother asked me________ ________ __________ _________ in the room.

6.My brother said to me, “I’m going to have a holiday next week.”

　 My brother ____　 _________ __________ _________going to have a holiday the next week.

5. Linda asked Amy_____she could tell her the general ideas of the poem.

A. that　　　　　　　　 B. whether　　　 C. what　　　　　　　 D. how

4. Tom hanks told his teacher that he____born in 1968.

A. was　　　　　　　　 B. had been　　 C. is　　　　　　　　 D. has been

3. The teacher told us that light____faster than sound.

A. traveled　　　　　　 B. had traveled　 C. is traveling　　　　 D.travels