诊断HBV感染最直接的证据为血清中存在（）.
A.HBsAg
B.HBeAg
C.HBcAg
D.HBV-DNA
E.抗HBC、IgM
参考答案：D
______ to school by boat is ______ fun than taking a bus. [ ]
A．Go, a lot of
B．To go, many more
C．Going, a lot more
D．Goes, a lot
浅Ⅱ度烧伤的组织学划分指（）
A.表皮角质层透明层
B.表皮角质层透明层颗粒层
C.表皮角质层透明层颗粒层棘层生发层真皮 * * 层
D.表皮角质层透明层颗粒层棘层生发层
E.表皮角质层透明层颗粒层棘层
