单项选择题
In order to prevent galvanic corrosion，an aluminum boat must be insulated from the davits and gripes. Which of the following is acceptable as an insulator?（）
A.Hard rubber
B.Canvas
C.Leather
D.Sponge rubber
点击查看答案&解析
相关考题
-
单项选择题
In battery charging rooms，ventilation should be provided（）.
A.at the lowest point
B.near the batteries
C.at the highest point
D.only when charging is in progress -
单项选择题
If passengers are on board when an abandon ship drill is carried out，they should（）.
A.take part
B.watch
C.go to their quarters
D.stay out of the way and do what they want -
单项选择题
I would be very much（）if you could arrange for a radio technician to come on board as soon as possible for my radar repair.
A.obliged
B.obliging
C.oblige
D.being obliged
