航海英語求生用語單項選擇題每日一練(2019.01.15)

來源：考試資料網(wǎng)

1 Chemical burns are caused by the skin coming in contact with（）.

2 After the boat is at the top of the davit heads，the davit arms begin moving up the tracks and are stopped by the（）.

3 Changing rescuers while carrying out artificial respiration should be done（）.

4 The depth over a shallow patch，（）about 1．5 miles southeastward of Nanshan Tou lighthouse，reduces to 8 meters.

5 The maximum speed of lowering for a lifeboat on gravity davits is controlled by the（）.

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