6、一個(gè)盒子里裝有相同大小的紅球、白球共個(gè),其中白球個(gè),從中任取個(gè),則概率為的事件是B
A.沒有白球 B.至少有一個(gè)白球 C.至少有一個(gè)紅球 D.至多有一個(gè)白球
5、設(shè)有直線m、n和平面、。下列四個(gè)命題中,正確的是 D
A.若m∥,n∥,則m∥n B.若m,n,m∥,n∥,則∥
C.若,m,則m D.若,m,m,則m∥
4、的展開式中x的系數(shù)是 A A.-4 B.-3 C.3 D.4
3、已知平面,為垂足,為斜線在平面內(nèi)的射影,,,,則和平面所成的角為C A. B. C. D.
2、從甲、乙等名同學(xué)中挑選名參加某項(xiàng)公益活動(dòng),要求甲、乙中至少有人參加,則不同的挑選方法共有C A.140種 B.112種 C.168種 D.70種
1、已知直線、和平面,則的一個(gè)必要不充分的條件是 D
A. B. C. D.、與成等角
25.(09江蘇) 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重慶) 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全國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全國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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