A schooner is a fore-and-aft rigged vessel with ______.A.a single mastB.two masts: with th

The preventer guy，as used on a conventional yard and stay rig，______．

A.Is rigged at an angle of 70° to 90° from the guy it assists

B.Takes the strain imposed on the schooner guy when burtoning cargo

C.Is rigged when lifting cargo that exceeds the SWL of a single whip

D.Should take the strain if the regular guy parts

A.Let the schooner guy take most of the strain，thus transferring the load to the opposite boom

B.Leave the preventer guy slack

C.Secure them as close together as possible on deck

D.Secure them so the angle between them is 90° at the boom head

A.前部

B.无襟翼着陆

C.后部

A.inflows

B.inflate

C.inside

D.input

A.mend

B.mending

C.pend

D.pending

A.Once a day

B.Once a week

C.Prior to getting underway

D.Only when entering waters of different density

A.Frame

B.Deckbeam

C.Stringer

D.Keel