已知集合A={x|x2-x-6≤0}，B={x|x2+x-6＞0}，S=R，则∁

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问题填空题

已知集合A={x|x²-x-6≤0}，B={x|x²+x-6＞0}，S=R，则∁_S（A∩B）等于______．

答案

∵A={x|x²-x-6≤0}=[-2，3]，B={x|x²+x-6＞0}=（-∞，-3）∪（2，+∞），

∴A∩B=（2，3]，

又S=R，

则∁_S（A∩B）=（-∞，2]∪（3，+∞）．

故答案为：（-∞，2]∪（3，+∞）

阅读理解

This is my good friend(朋友), John. He(他) is an English boy(一个英国男孩). He is twelve(12岁).

Ma Liya is my good friend, too. She is thirteen(13岁). She is a Chinese girl(一个中国女孩). We(我们)

are in(在) China. John, Ma Liya and I are good friends.

根据短文内容，判断正（T）误（F）。

( ) 1. John is my good teacher.

( ) 2. John is in China.

( ) 3. Ma Liya is an English girl.

( ) 4. John and I are good friends.

( ) 5. Ma Liya is twelve.

单项选择题

锯材防护剂透入度检测试样合格率应达到（）%。

A.60

B.70

C.80

D.90