【简答题】科学工作者欲培育能产生含铁量较高的转基因花生新品种, Ti 质粒中含有潮霉素抗性基因,具体步骤如图: ( 1 )铁结合蛋白基因和 Ti 质粒用 ______________ 切割后,用 DNA 连接酶连接,获得重组 Ti 质粒。培养基 1 中经过 ______________ 得到愈伤组织,培养基 2 中筛选的方法是在培养基中加入一定量的 ______________ 。 ( 2 )若铁结合蛋白基...
【简答题】He often complains about the noise from the busy street, which interferes with his work.
【单选题】He doesn’t like his job. He often ________ it.
【简答题】文献阅读成果展示作业安排(第6周开始展示) 一、具体安排 1 、从老师提供的选题清单中选择一个题目; 2 、在学习委员协调组织下形成 3 人团队; 3 、每位同学针对选题选两篇文献,每个团队共 6 篇文献,阅读文献; 4 、团队合作进行成果展示,一位同学负责汇报文献总结,一位同学负责展示通过阅读文献形成的研究计划,一位同学介绍由阅读文献到研究计划产生的分析过程(重点考察逻辑性,突出文献为我所用的理...
【单选题】远视眼(+2D)注视眼前33cm处的物体时,使用的调节力和集合力分别为
【单选题】His mother often complains__________the music he plays because it‘s too__________.
【判断题】地黄药材可加工炮制成黑色的熟地,药材变黑色的原因主要是因为其中含有环烯醚萜类成分
【单选题】He never complains about the difficulties he has in life. ,he always has ways to overcome them.
【单选题】In the sentence 'Often, the child becomes angry or complains when he does not get his way.' (Para.3), what does 'get his way' mean?
A.
Make himself understood.
C.
Have a friendly relationship with his parents.
D.
Find the way to his home.
【多选题】以下哪个例子体现的是应用生物技术大规模生产动植物中的药用成分,实现资源合理利用
D.
从红豆杉枝叶中提取10-去乙酰巴卡亭III,再经过化学半合成生产紫杉醇和多烯紫杉醇