航海英語船舶動力裝置單項(xiàng)選擇題每日一練(2019.01.15)

來源：考試資料網(wǎng)

1 Storage batteries on T-Boats must be located（）.

2 A fuel-air mixture below the lower explosive limit is too（）.

3 Vessels required to be equipped with an approved backfire flame arrester are（）.

4 One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is（）.

5 All diesel engines are classified as（）.