元朝分封的主要形态不包括：（）
A、草原宗王兀鲁思分封
B、五户丝食邑分封
C、汉世侯食邑分封
D、投下私属
参考答案：C
I really agree _____ what you have said. I think Miss Liu is very strict _____ her students. [ ]
A. at, with
B. to, with
C. with, with
D. on, at
乙肝五项检测指标中对机体有保护意义的是（）
A.HBsAg
B.HBeAg
C.抗-HBe
D.抗-HBc
E.抗-HBs
