Whencomparingcapacity-to-capacity，theIBMRearDoorHeateXchangerhelpsprovidemoreadvantagesthanotheravailablethermalenvironmentsolutions，usuallyatafractionofthecost.WhichofthefollowingstatementsisNOTanadvantageoftheIBMRearDoorHeateXchanger？（）
A.TheIBMRearDoorHeateXchangermaydramaticallyunburdenexistingACunitsbycoolingtheairbeforeitexhaustsfromtheelectronicsintothehotaisle.
B.TheIBMRearDoorHeateXchangerisahang，plug，andrundesignsotheunitsmaybeaddedquickly.
C.TheIBMRearDoorHeateXchangerisequippedwithtwofanstohelpmaintainwatertemperatureat18C（64.4F）andprovideevenairflow.
D.TheIBMRearDoorHeateXchangerisdesignedtosupporta42Urack.
参考答案：C
