与传染病的传染强度有关的因素包括() A.病原体种类 B.病原体数量 C.病原体毒力 发布时间:2017-06-05 03:25 │ 来源:www.tikuol.com 题型:多项选择题 问题: 与传染病的传染强度有关的因素包括()A.病原体种类B.病原体数量C.病原体毒力D.传染病的发生季节E.易感者的免疫状态
题型:多项选择题 动词填空。1. The dog often (bark) when someone rings the doorbell. 2. (not open) the door. It's cold outside. 3. -How long ______ Wang Fang (stay) in the hospital? -She stayed there for a week.4. ______ Betty (help) me with my maths tomorrow? 5. I look forward to (see) you soon. 查看答案