人体感染旋毛虫是由于() A.吞入感染性虫卵 B.误食幼虫囊包 C.幼虫从皮肤钻入 发布时间:2017-05-12 04:18 │ 来源:www.tikuol.com 题型:单项选择题 问题: 人体感染旋毛虫是由于()A.吞入感染性虫卵B.误食幼虫囊包C.幼虫从皮肤钻入D.虫卵经呼吸至咽部后咽下E.饮用含丝状蚴生水
题型:单项选择题 — What should I do with this passage?— _____to the main idea of each paragraph.[ ]A. Finding outB. Found outC. Find out D. To find out 查看答案
题型:单项选择题 This rare bird has become()A.an endangered specieB.endangered speciesC.endangering speciesD.an endangered species 查看答案