HBsAg持续(+),HBeAg(-),抗HBe(+)提示( )
A.急性乙型肝炎早期B.急性乙型肝炎恢复期C.慢性肝炎D.肝硬化E.HBsAg携带者
参考答案:E
There ______ lots of grass on the grassland. [ ]
A. is
B. are
C. have
D. has
体外受精的场所是[ ]
A.在水溶液中
B.在盐溶液中
C.在获能溶液或专用的受精溶液中
D.在酒精溶液中