单项选择题

The strake on each side of the keel is called a ______.
A.Sheer strake
B.Gatewood strake
C.Insulation strake
D.Garboard strake

A.A.Sheer
B.Gatewood
C.Insulation
D.Garboard
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单项选择题
A.5B.10C.15D.25
A.5
B.10
C.15
D.25
单项选择题
A.-1B.-2C.1D.3
A.-1
B.-2
C.1
D.3