Upon the survey it is found the deck control valve of the fore peak tank could not be（）.<br>A:tighted formally<br>B:shut tightly<br>C:combined properly<br>D:closed suitably

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

出自：海船船员证

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