问题
单项选择题
Every ship should hoist（）when approaching and entering ports.
A.its flashing light
B.the ship's name
C.its identification
D.its signal letters
答案
参考答案：D
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Every ship should hoist（）when approaching and entering ports.
A.its flashing light
B.the ship's name
C.its identification
D.its signal letters
参考答案：D