三俭制度是指（）。

A.量检查、数量检查、规格检查

B.质量、安全、卫生

C.质量、效率、安全

D.自检、互检、交接检

The machine has been used many years. _____ it doesn't work well occasionally.[ ]

A. That's because

B. It's no wonder that

C. There's no doubt if

D. It's unlikely that