An army spokesman stressed that all the soldiers had been ordered _____ clear warning before firing any shots.

A．to issue

B．being issued

C．to have issued

D．to be issued

滤油器的过滤能力应为油泵流量的两倍以上，运行过程中压力损失不得超过（）。

A.0.01～0.035Mpa

B.0.01～0.045Mpa

C.0.001～0.035Mpa

D.0.001～0.045Mpa