如果明天下雨，我们将停止卸货。

材料：

What advantages does the eye have over the radar ？

The eye has the following advantages:

Reliable

Sensitive to color

Can assess heading

Can identify small targets

Can see light configurations

Can assess ship types

Can identify conspicuous marks

Can identify flashing lights Has better discrimination

Can see changing weather patterns

Can see effect of sea on vessel

Not affected by blind arcs (if observer moves)．

问题：BLIND ARCS mean ______ ．

A.the arcs from which one can not see certain objects

B.the arcs which are blind

C.the black arcs

D.the arcs from which one can see certain objects

This paragraph is ______ ．A.a clause of a contract

B.an explanation of advantage of eyes over radar

C.a requirement from a government

D.an article of Colreg

DISCRIMINATION means the ______ ．A.provision

B.dimension

C.distinction

D.permission

The eye is more ______ than radar．A.distinguishable

B.reasonable

C.controllable

D.reliable

请帮忙给出每个问题的正确答案和分析，谢谢！

材料：

A block may not only indicate the insertion of new information，but also the omission of matter previously shown．The text of the Notice should invariably be read carefully．The limiting lines of a block are determined for convenience of reproduction．They need not be strictly adhered to when cutting out for pasting on the chart，provided that the preceding paragraph is taken into consideration．Owing to distortion the bocks do not always fit the chart exactly．When pasting a block on a chart，therefore，care should be taken that the more important navigational features fit as closely as possible．This is best done by fitting the block while it is dry and making two or three pencil ticks round the edges for use as fitting marks after the paste is applied to the chart．

问题：

DISTORTION means that ______．

A.the change in form of the block

B.extract of in form of the block

C.the extension in form of the block

D.the increasing of the data in the block

When cutting out and pasting the block care should be used to ensure that ______．A.it be dry enough

B.pencil should be used properly

C.the limits are adhered strictly

D.the more important navigational features fit as closely as possible

The block is not used to ______ ．A.show omissions

B.provide new information

C.make corrections to the Notice

D.change the shape of the charts

The block should be ______ on the chart．A.pasted

B.drawn by pencil

C.fitted

D.put

请帮忙给出每个问题的正确答案和分析，谢谢！

Set of current is ________ ．

A.its velocity in knots

B.direction from which it flows

C.estimated current

D.direction toward which it flows

________ with particular caution in this area．

A.go

B.proceed

C.move

D.remove

Roll-on／roll-off ships are equipped with ________ ．

A.cargo elevators

B.conveyor belts

C.ramps

D.derricks and winches for cargo handling

Radar is not only to obtain ________ ，but also to measure their distances away from you．

A.brightness of objects

B.color of targets

C.shape of targets

D.bearings of objects

al data is ________ ．

A.Supplements

B.Annual Summary

C.Navigational Warnings

D.Notice to Mariners