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
[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
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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