价格歧视实际上是一种(),它是经营者为了获取超额利润的手段。
A.价格差异
B.价格垄断
C.价格操纵
D.价格欺诈
参考答案:A
24. You ought to have put the milk in the refrigerator, and now ________sour.
A.it smell
B.it is smelt
C.it smells
D.it is smelling
子宫颈癌最常见的转移途径是()
A.直接蔓延
B.淋巴转移
C.血行转移
D.直接蔓延和种植
E.直接蔓延和淋巴转移