A.can be absorbed through the skin
B.causes irreversible damage to eye tissue
C.is a very unstable product
D.All of the above
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A.dump valve
B.deflector
C.separator
D.diverter
A.poor fix
B.good fix
C.poor signal quality
D.good signal quality
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
A.two red lights
B.one green light
C.one white light
D.one amber light
A.circle of equal altitude
B.parallel of declination
C.parallel of altitude
D.vertical circle
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A sweep oar is an oar that is（）.
The information on ocean voyage planning with routeing details for powered and sailing vessels is likely found in（）.
An orange flag showing a black circle and square is a（）.
Aboard a survival craft，ether can be used to（）.
The light vessel is reported（）.
The Coast Radio Stations are found in（）.
For details of these and other lights the larger scale charts and Admiralty Lists should be （）.
After the boat is at the top of the davit heads，the davit arms begin moving up the tracks and are stopped by the（）.
A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.
The program of graphical predictions of height against time for a period of up to seven consecutive days is contained in（）.