抗原抗体反应的特异性主要依赖于()。 A.抗原的相对分子质量 B.抗体的电荷 C.抗 发布时间:2017-05-02 21:41 │ 来源:www.tikuol.com 题型:单项选择题 问题: 抗原抗体反应的特异性主要依赖于()。A.抗原的相对分子质量B.抗体的电荷C.抗原和抗体的浓度D.抗原和抗体的构象E.免疫球蛋白的类别
题型:单项选择题 Hearing this bad news, she ______ the plate and broke it.[ ]A. picked B. fell C. dropped D. delivered 查看答案
题型:单项选择题 While prices are rising so fast, many people are working out ways to ______down their expenses. [ ]A. cut B. put C. turn D. settle 查看答案