Jim didn’t come back untill 12 last night, so his father        very late waiting for him.

A．stayed up

B．stayed away

C．stayed over

D．stayed ahead

下列抗HBe阳性时描述意义正确的是（）

A、说明HBe前C基因可能发生突变

B、表示HBV复制程度低于HBsAg阳性时

C、急性自限性肝炎时，与抗HBs同时出现，表现HBV复制减少

D、抗HBe阳性，提示HBVDNA已和宿主整合