白亮带形成原因是电磁搅拌产生的()沿凝固前沿流动,把两相区树枝晶间富集的母流冲刷出去而造成的。
参考答案:流股
----What is your new Chinese teacher like, Mary?
---Oh, ____________________________.
A.we’re getting along quite well with him
B.he likes playing football better than anything else
C.he has strange ways to make his classes lively and interesting
D.he is a handsome young man in his early thirties
创伤失血过多时,为防治ARDS应尽量补足胶体溶液,以保持血容量正常。