A large basin cut into the shore，closed off by a caisson，and used for drydocking of ships is known as a（）.<br>A:slipway<br>B:graving dock<br>C:ground warp<br>D:caisson dock

A large basin cut into the shore，closed off by a caisson，and used for drydocking of ships is known as a（）.
A:slipway
B:graving dock
C:ground warp
D:caisson dock

出自：海船船员证

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