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
单项选择题 Access to a cargo pumproom on a tank vessel carrying grades A，B，C or D liquid cargoes shall be（）.
单项选择题 A synonym for chloroform is（）.
单项选择题 A safe fuel system must（）.
