If the cause of severe list or trim is off-center ballast，co

A semisubmersible which flops between forward and aft angles of trim is likely to have ______.

A.KML less than KGL

B.an off-center LCG

C.LCG greater than LCB

D.KML greater than KMT

A tow astern is veering from side to side on its towline．The best way of controlling the action is to ______．

A.Trim the tow by the bow

B.Trim the tow by the stern

C.List the tow to windward

D.Adjust the length of the towing bridle

A、severe infection

B、increasing WBC

C、certain types of cancer

D、venous injury

A vessel has a strong wind on the port beam. This has the same affect on stability as ______.

A.weight that is off-center to starboard

B.increasing the draft

C.reducing the freeboard

D.increasing the trim

Your tanker is loaded down to her marks，and you find that she has too much trim by the stern．To adjust the trim，you may ______．

A.Add ballast forward

B.Load more cargo forward

C.Shift bunkers forward

D.All of the above

In no case shall ballast water be carried in cargo tanks，______ on those rare voyages when weather conditions are so severe that，in the opinion of the master，it is necessary to carry additional ballast water in cargo tanks for the safety of the ship.

A.besides

B.in particular

C.incase of

D.except

In all cases，however，the capacity of segregated ballast tanks shall be ______ such that，in any ballast condition at any part of the voyage，including the conditions consisting of lightweight plus segregated ballast only，the ship's draughts and trim can meet the necessary requirements．

A.At least

B.At most

C.So big as

D.As large as

A negative metacentric height ______.

A.should always be immediately corrected

B.will always cause a vessel to capsize

C.always results from off-center weights

D.All of the above are correct

材料：

Every new crude oil tanker of 20000 tons deadweight and above and every new product carrier of 30000 tons deadweight and above shall be provided with segregated ballast tanks．The capacity of the segregated ballast tanks shall be so determined that the ship may operate safely on ballast voyages without recourse to the use of cargo tanks for water ballast．

In all cases，however，the capacity of segregated ballast tanks shall be at least such that，in any ballast condition at any part of the voyage，including the conditions consisting of lightweight plus segregated ballast only，the ship’s draughts and trim can meet each of the following requirements：

（a）The moulded draught amidships（dm）meters（without taking into account any ship&39;s deformation）shall not be less than dm = 2.0 + 0.02L；

（b）The draughts at the forward and after perpendiculars shall correspond to those determined by the draught amidships（dm）as specified in sub-paragraph（a）of this paragraph，in association with the trim by the stern of not greater than 0.015L；

and（c）In any case the draught at the after perpendicular shall not be less than that which is necessary to obtain full immersion of the propeller．

In no case shall ballast water be carried in cargo tanks，except on those rare voyages when weather conditions are so severe that，in the opinion of the master，it is necessary to carry additional ballast water in cargo tanks for the safety of the ship，or，in exceptional cases where the particular character of the operation of an oil tanker renders it necessary to carry ballast water in excess of the quantity required，provided that such operation of the oil tanker falls under the category of exceptional cases as established by the Organization．

问题：

According to this passage，it is inferred that ________．

A.the crude oil is more pollutive than the product

B.the crude oil is less pollutive than the product

C.the crude oil and the product are equally pollutive

D.it can not tell whether the crude oil or the product is more pollutive

Ballast water ________ carried in cargo tanks on board of oil tankers．A.can be

B.can not be

C.can not，absolutely，be

D.can，only in rare or exceptional cases，be

This passage is most likely extracted from ________．A.Guide to Port Entry

B.Notices to Mariners

C.SOLAS

D.MARPOL

Assuming the length of a crude oil tanker is 200m，her max aft draft corresponding to her displacement of lightweight plus segregated ballast only should be ________．A.3m

B.4.5m

C.6m

D.7.5m

请帮忙给出每个问题的正确答案和分析，谢谢！

For a vessel with longitudinal inclination, an increase in GML causes ______.

A.list to stabilize at an angle of loll

B.trim to stabilize at an angle of loll

C.trim to increase

D.trim to decrease