传染病垂直传播的途径是A、胎盘传播、上行性传播B、上行性传播、机械传播C、胎盘传播、注射传播D、血液传播,经口传播E、接触传播、空气传播

作者: rantiku 人气: - 评论: 0
问题 传染病垂直传播的途径是
选项 A、胎盘传播、上行性传播 B、上行性传播、机械传播 C、胎盘传播、注射传播 D、血液传播,经口传播 E、接触传播、空气传播
答案 A
解析

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