A ______ is created by a pressure gradient or slope in the water level．A.gradient currentB.density currentC.swift currentD.torrent current
A ______ is created by a pressure gradient or slope in the water level．
A.gradient current
B.density current
C.swift current
D.torrent current
相关考题：
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单选题A（）is created by a pressure gradient or slope in the water level.Agradient currentBdensity currentCswift currentDtorrent current
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