试述淤血、缺血、血栓形成、栓塞及梗死之间的相互关系。
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He will come to call on you the moment he ______ his painting．
A. will finish B．finished C．has finished D．had finished
We can hardly avoid making any mistakes in our work, ______ hard we try.
A. whatever B．how C．however D．no matter
He wondered ______ .
A. what will be his wife's reaction
B. what would his wife's reaction be
C. how would be his wife's reaction
D. what his wife's reaction would be
That's the reason ______ Ann could not do her part of the job.
A. that B．of C．why D．because
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