关于完全性葡萄胎的定义错误的是
A.滋养细胞增生B.无胎儿及其附属物C.整个子宫腔内充满水泡状组织D.染色体核型常是三倍体E.绒毛水泡状水肿
参考答案:D
— There used to be many trees in the city.
— Yes, but there are _______ now. [ ]
A. less
B. few
C. a few
D. fewer
感染性废物包装袋颜色为()
A.绿色
B.红色
C.黄色
D.黑色
E.褐色