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【单选题】
Which statement about the deck line is TRUE ________．A.
The top of the deck line is marked at the highest point of the freeboard deck，including camber，at the midships point
B.
A vessel with wooden planks on a steel deck will have the deck line marked at the intersection of the upper line of the wood sheathing with the side shell
C.
The deck edge is marked at the intersection of the freeboard deck with the side shell，at the lowest point of sheer，with the vessel at even trim
D.
On a vessel with a rounded stringer-sheer plate，the deck line is marked where the stringer plate turns down from the plane of the deck line
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举一反三
【单选题】GB50235规定，阀门应进行壳体压力试验和密封试验，具有上密封结构的阀门还应进行上密封试验，不合格者不得使用。用于GC2级管道和设计压力小于10MPa的所有C类流体管道的阀门，应每个检验批抽查()%，且不得少于()个。
A.
101
B.
202
C.
303
D.
404
【简答题】应逐个进行壳体压力试验和密封试验的阀门是（ ）。
参考解析：
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