单选题A large basin cut into the shore，closed off by a caisson，and used for dry docking of ships is known as a（）.AslipwayBgraving dockCground warpDcaisson dock
单选题
A large basin cut into the shore，closed off by a caisson，and used for dry docking of ships is known as a（）.
A
slipway
B
graving dock
C
ground warp
D
caisson dock
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