HBV的抗原成分中哪一种与病毒的中和性作用有关()
A、HBvAg
B、HBsAg
C、HBcAg
D、HBeAg
E、HBuAg
参考答案:B
荀子曰:“天有常道矣,地有常数矣。”下列诗句中与此寓意相近的是
A.会当凌绝顶,一览众山小(唐·杜甫)
B.蝉噪林逾静,鸟鸣山更幽(南北朝·王籍)
C.两句三年得,一吟双泪流(唐·贾岛)
D.草木本无意,荣枯自有时(唐·孟浩然)
—When did they _____?
—They've _____for half a year.[ ]
A. marry; gotten married
B. get married; been married
C. marry; been married
D. get married; married