适合使用卡方检验方法的是()
A、离散X离散Y
B、离散X、连续Y
C、连续X、离散Y
D、连续X、连续Y
参考答案:A
简述商鞅变法的主要内容。
John has got a bad fever these days, and he says he doesn't want to see a doctor, but
I'm afraid he has no _____. [ ]
A. extra
B. alternative
C. treatment
D. possibility