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单选题
The cylinder covers are secured by eight elastic holding down arranged in four pairs（）
A
nuts
B
screws
C
studs
D
flanges
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单选题The cylinder covers are secured by eight elastic holding down arranged in four pairs（）A
nutsB
screwsC
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flanges
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result inC
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given from
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单选题Cracks in cylinder and cylinder covers may （） from unequal heating.A
makeB
causeC
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单选题A life raft which has inflated bottom-up on the water（）.A
should be righted by standing on the carbon dioxide cylinder, holding the righting straps, and leaning backwardsB
should be righted by standing on the life line, holding the righting straps, and leaning backwardsC
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must be cleared of the buoyant equipment before it will right itself
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should be righted by standing on the carbon dioxide cylinder，holding the righting straps，and leaning backwardsB
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must be cleared of the buoyant equipment before it will right itself
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单选题Increasing the area of the anchor flukes will（）.A
increase holding powerB
decrease holding powerC
make penetration more completeD
not effect holding power
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