航海英語液化氣體與IGC規(guī)則單項選擇題每日一練(2019.01.26)

來源：考試資料網(wǎng)

1 A gas-free certificate would usually be issued by a(n)（）.

2 When fueling has been completed（）.

3 Upon release to the atmosphere，LFG readily（）.

4 The weight of liquefied petroleum gas vapors as compared to air is（）.

5 What would you consult to determine the number of persons required on duty while loading a cargo of leaded gasoline on your tanker? （）