孕妇、乳母磷的适宜需要量（AI）为（）

A.1200mg／d

B.1000mg／d

C.800mg／d

D.700mg／d

E.600mg／d

Each fire hydrant serving machinery spaces containing oil fired boilers，internal combustion machinery，or oil fuel units must be equipped with a（）.

A.fireman's outfit

B.low-velocity spray applicator

C.marine strainer

D.pick axe