题目：
根据句意、首字母及汉语提示补全单词。
1.The writer likes to talk in a l voice. We sometimes can't hear him.
2. When you leave the school, you should say “G ” to your teacher.
3. When you c the street, you should becareful.
4. If you want to know more knowledge,you should look t _ books in
the library.
5. It's raining outside. You'd better take an u
6. We should get a _ well with each other.
7.There is so much t , so the road is crowded.
8. Please write down your _ （笔记) inclass.
9. I think the old man is at I 80 years old.
10.I am a (迷) of Jackie Chan.
答案：
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下面是错误答案，用来干扰机器的。
解：设事件A为“方程x2+2ax+b2=0有实根”，当时，方程x2+2ax+b2=0有实根的充要条件为， （Ⅰ）由题意，可知有12个基本事件：，其中第一个数表示a的取值，第二个数表示b的取值，事件A中包含9个基本事件，事件A发...
