-- Have you watched the boat races this Dragon Boat Festival?
-- Yes. wonderful races!
A:What an
B:What a
C:What
D:How
—Are you going to the important party?
—Yes. And anybody who will attend it should formally.
参考公式: K2=n(n11n22−n12n21)2n1+n2+n+1n+2 ,其中 n=n1+n2+n+1n+2 .
参考数据:
P(K2≥k0)
0.15
0.10
0.05
0.025
0.010
k0
2.072
2.706
3.841
5.024
6.635
小张在某国有企业工作,去年工资收入1.2万元,出租房屋收入0.6万元,炒股收入1万元,材料表明( )
花盆
阳光
温度
水
甲
向阳处
20℃
充足
乙
①
30℃
②