问题
单项选择题
Upon the survey it is found the deck control valve of the fore peak tank could not be（）.
A.tighted formally
B.shut tightly
C.combined properly
D.closed suitably
答案
参考答案：B
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Upon the survey it is found the deck control valve of the fore peak tank could not be（）.
A.tighted formally
B.shut tightly
C.combined properly
D.closed suitably
参考答案：B