According to a study carried out by an American university, when you eat has ______ on your mood as ______ you eat.

A．much of as an effect; what

B．much of as an effect; which

C．as much of an effect; what

D．as much of an effect; which

采煤机维护与检修的内容包括班检、日检、周检、（）

A.年检

B.旬检

C.月检

D.季检