写一个系数是﹣2,含有字母x,y的单项式( ).
﹣2xy(答案不唯一)
I _____ to you as soon as I get there.
A.write
B.wrote
C.have written
D.will write
最易导致肾气不固的情志因素是()
A.喜
B.怒
C.忧
D.恐
E.悲