单项选择题
A.go into place as the raft is inflated B.be put up after everyone is aboard C.be put up only in severe weather D.be used as a sail if the wind is blowing
Kapok life jackets should NOT be（）.A.stowed near open f...
单项选择题Kapok life jackets should NOT be（）.
A.stowed near open flame or where smoking is permitted B.used as seats，pillows，or foot rests C.left on open decks D.All of the above
It is permissible to place an eye splice in wire rope u...
单项选择题It is permissible to place an eye splice in wire rope used as cargo gear providing the splice is made using（）.
A.two tucks with whole strands and one tuck with one-half strand B.three tucks with whole strands and two tucks with 1/2 the wire cut from the tucking strand C.three tucks with whole strands D.two tucks with whole strands and three tucks with half strands
Is it safe（）a rocket?A.to shootB.to fireC.to let goD.to...
单项选择题Is it safe（）a rocket?
A.to shoot B.to fire C.to let go D.to send to sky
