Fire hose couplings ______.A.are made of bronze brass or soft alloy metalsB.should be pai

职业资格 自考英语 已帮助 人

Fire hose couplings ______.

A.are made of bronze brass, or soft alloy metals

B.should be painted red in order to identify hose lengths

C.are specially hardened to prevent crushing

D.should be greased frequently

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。