(A)等于; (B)只有超過; (C)只有低于; (D)超過或低于
(A)流量報(bào)警; (B)流速報(bào)警; (C)壓力報(bào)警; (D)壓力測量
A.1°~8°B.2°~8°C.3°~10°D.5°~10°