6.在2008年的世界无烟日(5月31日),小华学习小组为了解本地区大约有多少成年人吸烟,随机调查了1000个成年人,结果其中有150个成年人吸烟.对于这个关于数据收集与处理的问题,下列说法正确的是
A.调查的方式是普查 B.本地区约有15%的成年人吸烟
C.样本是150个吸烟的成年人 D.本地区只有850个成年人不吸烟
5.在Rt△ABC中,∠C=90°,sinA=,则tanB的值是
A. B. C. D.
4.某几何体的三视图如左图所示,则此几何体是
A.正三棱柱 B.圆柱 C.长方体 D.圆锥
3.下面是一位美术爱好者利用网格图设计的几个英文字母的图形,你认为其中既是轴对称图形又是中心对称图形的是
2.下列各式运算结果为的是
A. x4·x4 B. (x4)4 C.x16÷x2 D.x4+x4
1. 的相反数是
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