I didn’t feel like ________, so he suggested ________ an English song right away.

A．reading; practising singing

B．reading; practising to sing

C．to read; practising singing

D．to read; practising to sing

在胜任特征模型定义中可采用t检验和（）等数量分析方法。

A.回归

B.数学表达式

C.方程因子

D.方程式