【单选题】You have isolated a new species of mRNA using an oligo-dT column. You then perform an R-looping experiment to determine if the gene encoding for your mRNA contains introns. Below is a representation o...
【简答题】根据中文和英文提示,写一封意思连贯、符合逻辑、不少于60词的回信。信的开头和结尾已给出,其词数不计入所完成的回信内。请不要写出你的校名和姓名。 假设你叫张华,是美国中学生鲍勃的朋友。你收到了他的电子邮件,请给他回复,回答他的问题,提出你的建议,并就此事谈谈你的看法。 Hi! Zhang Hua, I have a big problem these days. I spend much tim...