6.在2008年的世界無煙日(5月31日),小華學(xué)習(xí)小組為了解本地區(qū)大約有多少成年人吸煙,隨機(jī)調(diào)查了1000個(gè)成年人,結(jié)果其中有150個(gè)成年人吸煙.對(duì)于這個(gè)關(guān)于數(shù)據(jù)收集與處理的問題,下列說法正確的是![]()
A.調(diào)查的方式是普查
B.本地區(qū)約有15%的成年人吸煙![]()
C.樣本是150個(gè)吸煙的成年人 D.本地區(qū)只有850個(gè)成年人不吸煙![]()
5.在Rt△ABC中,∠C=90°,sinA=
,則tanB的值是 ![]()
A.
B.
C.
D.![]()
![]()
4.某幾何體的三視圖如左圖所示,則此幾何體是 ![]()
A.正三棱柱 B.圓柱 C.長(zhǎng)方體 D.圓錐![]()
3.
下面是一位美術(shù)愛好者利用網(wǎng)格圖設(shè)計(jì)的幾個(gè)英文字母的圖形,你認(rèn)為其中既是軸對(duì)稱圖形又是中心對(duì)稱圖形的是![]()
![]()
![]()
![]()
![]()
![]()
![]()
![]()
![]()
2.下列各式運(yùn)算結(jié)果為
的是![]()
A.
x4·x4 B. (x4)4
C.x16÷x2 D.x4+x4![]()
1.
的相反數(shù)是 ![]()
A.
B.
C.
D. ![]()
![]()
29.During their stay in Britain,they get on a bus at the weekend and let it take them anywhere it went,exploring the beautiful countryside.
A.would B.should C.might D.must
答案 A
28.I would love to the cinems yesterday,but I had to stay home,looking after my sick mother.
A.going B.having gone C.to go D.to have gone
答案 D
27.As a keen netizen,she thinks there be better ways for the local government to deal with the
Internet cafes rather than to shut them down.
A.would B.should C.could D.might
答案 B
26.-Listen!Someone is knocking at the door.
- be Mary.She has just been to Beijing.
A.She mustn’t B.It can’t C.It must D.She may
答案 C
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