The purpose of a preventer as it is used on a conventional yard and stay cargo rig is to（）.
1、The purpose of a custom is to cut down
The purpose of a custom is to cut down imports in order to protect domestic industry and workers from foreign competition.AtaxBtollCfeeDtariff
2、The purpose of a devil’s claw is to（）.
The purpose of a devil’s claw is to（）.Aact as a chain stopperBprevent the windlass from engagingCprevent the chain from fouling on deckDcontrol the wildcat
3、It seemed as if all of a（）the animal h
It seemed as if all of a（）the animal had smelt danger in the air.AsuddenBmomentCminuteDonce
4、The purpose of a bilge well is to（）.
The purpose of a bilge well is to（）.Aafford access to the shell through the double bottomsBcollect water to be pumped outCprovide access for the pneumercatorDprovide a base line for sounding measurement
5、What is the purpose of a rendezvous po
What is the purpose of a rendezvous point (RP)?（）A acts as a meeting place for sources and receivers of multicast trafficB used in PIM dens...
6、The primary purpose of a load line is
The primary purpose of a load line is to establish required（）.Aminimum freeboardBGMCtransverse stabilityDfresh water allowance