单选题Solid green arrows on the main body of a pilot chart indicate （）.A prevailing wind directionsB prevailing ocean current directionsC probable surface current flowD shortest great circle routes

Solid green arrows on the main body of a pilot chart indicate ______.

A.prevailing wind directions

B.prevailing ocean current directions

C.probable surface current flow

D.shortest great circle routes

How is the annual rate of change for magnetic variation shown on a pilot chart? ______.

A.Gray lines on the uppermost inset chart

B.Red lines on the main body of the chart

C.In parenthesis on the lines of equal magnetic variation

D.Annual rate of change is not shown

A pilot chart does NOT contain information about ______.

A.average wind conditions

B.tidal currents

C.magnetic variation

D.average limits of field ice

A vessel showing a green light over a white light in a vertical line above the level of the sidelights is ______.

A.engaged in underwater construction

B.under sail and power

C.a pilot vessel

D.trawling

The numeral in the center of a wind rose circle on a pilot chart indicates the ______.

A.total number of observations

B.average wind force on the Beaufort scale

C.average wind force in knots

D.percentage of calms

______ day，pilot flag should be displayed from main mast．

A.From

B.By

C.on

D.With

Entering from sea，a daymark on the port side of the channel would be indicated on a chart by a ______.

A.red triangle with the letter R

B.white triangle with the letters RG

C.green square with the letter G

D.white square with the letters GR

材料：

In the early hours of a November morning，the fully laden 42，259gt Panamanian registered container vessel Ambassador Bridge was inbound to the English Channel，and had closed the south Devon coast to embark a pilot off Brixham．

In preparing to embark the pilot at the port side pilot station situated some 4m above the waterline，a seaman was detailed off to rig the pilot ladder and stand by to receive him．He made a radio check with the bridge when he arrived，but when the bridge tried to contact him again as the pilot boat approached，there was no reply．An officer was sent down to investigate．

The chief officer found the pilot door wide open，the ladder unrigged，water sloshing around the station deck，but no sign of the seaman detailed off to prepare the ladder for embarkation．

The body of a man，later identified as the deceased seaman，was recovered from the sea some four hours later．He was not wearing a lifejacket．

问题：

Ambassador Bridge was not ________．

A.an inbound vessel to the English channel

B.a Panamanian registered container vessel

C.in ballast

D.near the Devon coast

The body of the deceased seaman was recovered by ________．A.the C/O

B.the Pilot

C.a salver

D.someone not mentioned

It can be concluded that the deceased seaman ________．A.wore a lifejacket but lost it when overboard in the sea

B.committed suicide

C.dropped into the sea to catch the pilot ladder

D.was given instructions in detail before being sent to his station

Of the following，________ is not correct．A.the vessel was receiving her pilot who was to come down from the pilot station which was 4m above the sea

B.the deceased did not rig the pilot ladder

C.the deceased reported to the bridge as soon as he arrived there

D.the vessel was receiving her pilot at port side

请帮忙给出每个问题的正确答案和分析，谢谢！