经检测某病毒的核酸,得知其碱基的含量分别为:A—23%,T—36%,G—21%,C— 发布时间:2019-02-23 09:32 │ 来源:www.tikuol.com 题型:单项选择题 问题: 经检测某病毒的核酸,得知其碱基的含量分别为:A—23%,T—36%,G—21%,C—20%,试问其核酸应为()A.双链DNAB.单链DNAC.双链RNAD.单链RNA
题型:单项选择题 Your article is too long. You must _______ to about 3000 words.[ ]A. cut it off B. cut it up C. cut it down D. cut it into 查看答案