（）可以进行实时交谈和互传信息。
A.EOS
B.IM
C.FAQ
D.ERP
参考答案：B
．After a long walk, the little boy got home at last, ________.
A．tiredly and hungrily
B．tiring and hungry
C．tired and hungrily
D．tired and hungry
桑螵蛸的适应证为（）
A.肠胃出血
B.胃痛吐酸
C.肾虚阳痿
D.遗精遗尿
E.崩漏下血
