Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from（）.<br>A:low steel on the Huey P. Long Bridge<br>B:mean sea level<br>C:the local water table<br>D:the minimum dam control level

Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from（）.
A:low steel on the Huey P. Long Bridge
B:mean sea level
C:the local water table
D:the minimum dam control level

出自：海船船员证

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