航海英語船舶設(shè)備名稱單項(xiàng)選擇題每日一練(2019.01.26)

來源：考試資料網(wǎng)

1 In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.

2 An example of a messenger is a（）.

3 A strong back refers to a（）.

4 As oil pipe line connections were broken，（）quantity of oil was caused to spill onto the wharf and into the dock water.

5 The portable radio apparatus means（）.

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