微生物与食品有()的关系。
A、亲密
B、有好
C、相互
D、密切
参考答案:D
--- You ought to have given them some advice.
--- , but who cared what I asked?
A.I ought to
B.So I ought
C.So it was
D.So I did
在自动闭塞区段,当货物列车在设于上坡道上的通过信号机前停车后起困难时,在该信号机上应装()。