The teacher often tells us _____ much time _____ TV. [ ]

A. not to spend, watch

B. to not spend, watching

C. not to spend, watching

D. don't spend, watch

欲对某地25名7～10岁儿童体重与肺活量回归系数进行假设检验，不可采用

A．回归系数t检验法

B．回归系数F检验法

C．相关系数t检验法

D．查相关系数界值表法

E．回归系数的秩和检验