单项选择题

甲型病毒性肝炎传染性最强的是

A.发病前2周
B.黄疸出现前
C.症状明显时
D.整个病程
E.起病后第2周
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未分类题
Speaker A: Have you ever been to the Temple of Heaven in Beijing?Speaker B: ______A.No, but I have no timE.B.No, but I'd like to.C.Yes. I was too busy then.D.Yes. I couldn't do it right now.
A.No,
B.
B.No,
C.
C.Yes.
D.
D.Yes.
单项选择题
麻疹合并肺炎者应隔离至出疹后
A.5天
B.10天
C.14天
D.21天
E.28天
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