平行四边形的判定3:两组对角分别( )的四边形是平行四边形。
相等
He ________ have completed his work; otherwise, he wouldn't be enjoying himself by the seaside.[ ]
A.should
B. must
C. wouldn't
D.can't
淋证的病机主要是()
A.热伤血络
B.脾气亏虚
C.气机郁滞
D.肾气亏虚
E.膀胱湿热