He is ________ scolding his child,which is not a good way to educate him.

A．often

B．usually

C．frequently

D．always

根据《安全生产法》的规定，煤矿企业与从业人员订立的劳动合同，应当载明有关（）的事项。

A.政治待遇

B.保障从业人员劳动安全

C.生活福利

D.防止职业危害