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The purpose of a bilge well is to ______．
A.Afford access to the shell through the double bottoms
B.Collect water to be pumped out
C.Provide access for the pneumercator
D.Provide a base line for sounding measurements
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单选题The purpose of a bilge well is to（）.A
afford access to the shell through the double bottomsB
collect water to be pumped outC
provide access for the pneumercatorD
provide a base line for sounding measurements
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