Pick out the wrong statement. In an agitated vertical cylindrical reaction vessel, the___________________?

A. Ratio of liquid depth to tank diameter (i.e. the filling ratio) recommended for most purposes is 1

B. Dished bottom vessel has very high power consumption

C. Filling ratio for dispersing gas in a liquid is 2 for sufficiently long contact period

D. Flat bottom and conical bottom vessels have low agitation efficiency for agitation of heavy solids in liquids

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