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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(2019.01.24)

來源：考試資料網(wǎng)

1 A space should be ventilated when（）.

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2 After putting on a self-contained breathing apparatus，you open the air supply and hear a continuous ringing of a bell. What does this mean? （）

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3 An aneroid barometer on a boat should always be（）.

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4 According to the Chemical Data Guide，epichlorohydrin is a(n)（）.

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5 An icebreaker assisting a vessel through an ice field would display a visual signal consisting of the code letter “E” (Echo) to signify that “（）”.

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