有关HBV血清标志,唯一具有保护作用的是()
A.HbsAg
B.HbeAg
C.抗-HBs
D.抗-HBe
E.抗-HBc
参考答案:C
—Are the sweaters yours?
—Yes, _________.[ ]
A. it's hers
B. they're theirs
C. it's ours
D. they're ours
社区自决原则的依据是什么。