受体菌直接摄取了供体菌游离DNA片段,这一过程称为转导.() 发布时间:2017-07-11 15:28 │ 来源:www.tikuol.com 题型:判断题 问题: 受体菌直接摄取了供体菌游离DNA片段,这一过程称为转导.()
题型:判断题 —May I swim in the lake, Dad?—No, you _______. Look! Here is a notice "No swimming!"[ ]A. may not B. mightn't C. mustn't D. needn't 查看答案