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
5、设有直线m、n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,m,m,则m∥
4、的展开式中x的系数是 A A.-4 B.-3 C.3 D.4
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.
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
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.、与成等角
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
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
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
(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
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