hebei@sohu、com是一个电子邮件地址，其中hebei是（）。
A、域名
B、用户名
C、Ip地址
D、计算机名
参考答案：B
下列哪项是特异性感染（）。
A.疖
B.丹毒
C.气性坏疽
D.新生儿皮下坏疽
E.脓性指（趾）头炎
Last week, only two people came to look at the house, wanted to buy it. [ ]
A. none of them
B. both of them
C. none of whom
D. neither of whom
