对流换热
参考答案:
壁面和流体之间在对流和导热同时作用下进行的热量传递称之为对流换热。
We all know it will be next June we can really have a rest.
A.when
B.before
C.since
D.until
新药、仿制药和进口药的申报与审批有何异同?