噬菌体侵染细菌的实验证明了:() A.蛋白质是遗传物质 B.DNA是遗传物质 C.R 发布时间:2019-02-24 16:31 │ 来源:www.tikuol.com 题型:单项选择题 问题: 噬菌体侵染细菌的实验证明了:()A.蛋白质是遗传物质B.DNA是遗传物质C.RNA不是遗传物质D.蛋白质和DNA是遗传物质
题型:单项选择题 Take it easy. Don't be _____.[ ]A. stressing B. stressing out C. stressed D. stressed out 查看答案
题型:单项选择题 You can't imagine that a well-behaved gentleman ____ be so rude to a lady. [ ]A. might B. need C. should D. would 查看答案