______ heat exchanges pass fluid over a plate where a heating or cooling medium is being passed up or down on the other side of the plate.
______ heating is thermal transfer due to collisions of hot food particles with cooler ones.
在对食品进行给处理时,低浓度食盐对微生物有保护作用,而高浓度食盐对微生物的抵抗力有削弱作用。()
直线型传热曲线为单纯的传导或对流传热食品的传热曲线。()