良性葡萄胎的病理变化有()
A.绒毛上皮细胞增生
B.绒毛间质水肿
C.绒毛退行性变
D.绒毛间血管消失
E.绒毛侵入子宫肌层
参考答案:A, B, C, D
It was funny that when _______ Mary began to weep sadly.
A.praising
B.praised
C.to praise
D.having praised
除尘变压器装有如下保护。