一组数据-8,-4,5,6,7,7,8,9的极差是( ),方差是( ),标准差是( )。
17,44,
—I wonder if I could possibly use your car for tonight?
—_______. I’m not using it anyhow.
A.Sure, go ahead
B.I don’t know
C.Yes, indeed
D.I don’t care
汉字“人、木、直、手、月”中能通过平移得到另一个字的有( )
A.1个
B.2个
C.3个
D.4个