单项选择题
A.apply straw or sawdust on the oil B.contain the spread of the oil C.throw grains of sand into the oil D.have the vessel move out of the spill area
According to the Chemical Data Guide，which reactive gro...
单项选择题According to the Chemical Data Guide，which reactive group(s) is/are not compatible with the products polybutene and o-xylene? （）
A.Nitric acid B.Amides C.Alcohols，glycols D.Phenols，cresols
According to the Chemical Data Guide，1，3 - pentadiene p...
单项选择题According to the Chemical Data Guide，1，3 - pentadiene possesses which characteristic? （）
A.Colorless liquid，mild aromatic odor B.Pale yellow liquid，strong odor C.Colorless liquid，faint odor D.Straw-colored liquid，sweet-odor
According to regulations，access to a cargo pumproom in ...
单项选择题According to regulations，access to a cargo pumproom in a tank vessel carrying grades C or D liquid cargo shall be（）.
A.from areas equipped with power ventilation B.only from enclosed areas free from sources of vapor ignition C.from the open deck D.from within the vessel
