根据下列材料请回答 86～90 题： 第 86 题 2007年我国全年水资源总量为：

When being towed，a fairlead is a ().

A.Fabricated shape used to change the direction of a flexible member of the tow hookup

B.Fabricated shape used to secure the tow hookup to the towed vessel

C.Line connecting the fishplate to the bridle legs

D.Line connecting the tow bridle to the towed vessel

In restricted visibility a towed vessel must sound a fog signal when it is ().

A.the last vessel in the tow

B.the last vessel in the tow and it is carrying a crew

C.manned，regardless of its position in the tow

D.None of the above are correct

tow in their ability to change course shall，when making way，exhibit ______.

A.the masthead lights for a towing vessel

B.the lights for a vessel restricted in its ability to maneuver

C.sidelights，stern light and towing light

D.All of the above

s a ().

A.vessel not under command

B.sailing vessel

C.vessel being towed(manned)

D.vessel being towed(unmanned)

tioned with its ().

A.Bow extending forward of the tow

B.Stern amidships of the tow

C.Stern extending aft of the tow

D.Bow even with the bow of the tow

A vessel or object being towed astern shall display a(n) ______.

A.forward masthead light

B.after masthead light

C.stern light

D.All of the above

A vessel engaged in fishing，and at anchor，shall show ______.

A.an anchor light

B.sidelights and a stern light

C.three lights in a vertical line，the highest and lowest being red，and the middle being white

D.None of the above

When a vessel is in any doubt as to whether such a situation exists she shall ()that it does exist and act accordingly.

A.consume

B.assume

C.perfume

D.resume

r-taken has to take action to permit safe passing， the vessel intending to overtake shall indicate her intention by sounding appropriate signal． This means that ________ ．

A.the vessel to be overtaken shall sound appropriate signal first

B.the overtaking vessel shall sound appropriate signal first

C.the overtaking vessel shall take action to permit safe passing

D.the vessel to be overtaken shall take action to permit safe passing before hearing appropriate signal

A single vessel being towed alongside shall exhibit ______.

A.one all-round white light

B.sidelights and a stern light

C.only the outboard sidelight and a stern light

D.a masthead light，sidelights，and a stern light