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【多选题】
用具的基本要求是:A.
防潮
B.
避光
C.
隔热
D.
无味
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举一反三
【单选题】A list signal of one white light indicates that the vessel is （）.
A.
on an even keel
B.
listing about 1° to the side the light is displayed on
C.
listing over 5° With the light displayed on the high side
D.
listing，and the chutes should be directed to the side where the light is displayed
【单选题】A vessel showing a yellow light over a white light at night is a vessel ().
A.
engaged in piloting
B.
towing astern
C.
engaged in fishing
D.
in distress
【单选题】A buoy marking a wreck will show a(an) ______.
A.
white light FL (2) and a topmark of 2 black spheres
B.
occulting green light and may be lettered
C.
yellow light and will be numbered
D.
continuous quick white light and may be numbered
【单选题】On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. The red sector ______.
A.
indicates the limits of the navigable channel
B.
indicates a danger area
C.
is used to identify the characteristics of the light
D.
serves no significant purpose
【单选题】(White and black) light, (if mixing) (in) the right proportion, (will show) us grey.
A.
White and black
B.
if mixing
C.
in
D.
will show
【单选题】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
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