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6、一个盒子里装有相同大小的红球、白球共个,其中白球个,从中任取个,则概率为的事件是B 

A.没有白球    B.至少有一个白球    C.至少有一个红球   D.至多有一个白球

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5、设有直线mn和平面。下列四个命题中,正确的是 D

A.若m,n,则m∥n    B.若m,n,m,n,则

C.若m,则m   D.若mm,则m∥         

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4、的展开式中x的系数是 A  A.-4  B.-3  C.3   D.4

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3、已知平面,为垂足,为斜线在平面内的射影,,则和平面所成的角为C A.  B.    C.  D.

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2、从甲、乙等名同学中挑选名参加某项公益活动,要求甲、乙中至少有人参加,则不同的挑选方法共有C   A.140种    B.112种   C.168种   D.70种

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1、已知直线和平面,则的一个必要不充分的条件是 D

A.   B.   C.   D.成等角

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25.(09江苏) Nine in ten parents said there were significant differences in their approach to educating their children compared with __ of their parents.

A. those        B. one       C. both       D. that

[答案]D

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22.(09重庆) Over the past 20 years, the Internet helped change our world in     way or another for the better.

A. any  B. one  C. every    D. either

[答案]B

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23.(09全国2卷) Charles was alone at home, with     looking after him.

A. someone  B. anyone   C. not one  D. no one

[答案]D

(09全国2 )24。The CDs are on sale! Buy one and you get      completely free.

A. other    B. others    C. one   D. ones

[答案]C

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7.(09浙江)-I’ve read another book this week.

-Well, maybe _____ is not how much you read but what you read that counts.

A.     this         B. that              C. there             D. it

[答案]D

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