单项选择题
Some unit operations just include 1 transfer, however others maybe include 2 or 3 transfers at the same time, please indicate the unit operation below that exists mass and heat transfers meanwhile?一些单元操作只存在一种传递,有些则同时存在2到3种单元操作,请指出下面哪个单元操作既属于质量传递同时也属于热量传递?( )
A.Distillation精馏
B.Cooling 冷却
C.Heating加热
D.Transportation of fluids 流体输送