航海英語固體散裝危險(xiǎn)品與BC規(guī)則單項(xiàng)選擇題每日一練(2019.01.13)

來源：考試資料網(wǎng)

1 An example of a grade B product is（）.

2 After the initial cleaning of flue gas in an inert gas system the gas is passed through what device for final cleaning?（）

3 After the passage of a cold front the visibility（）.

4 An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.

5 An example of a grade C product is（）.