航海英語船舶輔機單項選擇題每日一練(2019.01.07)

來源：考試資料網(wǎng)

1 Apparent wind speed blowing across a ship under tow can be measured by a(n)（）.

2 As a rule，ships of most configurations，when drifting in calm water with negligible current，will lie（）.

3 As compared to carbon dioxide，dry chemical has which advantage?（）

4 As the temperature of an air mass decreases，the（）.

5 Any extinguishing agent used on a Class “C” fire must have which important property? （）