【简答题】实验分析：   某蛋白Fn可能与细胞的铁元素代谢（即细胞对铁的吸收、储存或排放）有关。为了研究它的功能，进行了以下实验：  首先将编码Fn的cDNA克隆到真核细胞的表达载体上，且载体的启动子受到四环素的激活，即只有加入四环素时，克隆的基因才表达。将克隆有Fn的cDNA的载体转染到细胞中，用含有柠檬酸亚铁的培养液培养细胞，并进行了两个实验。  实验1：将转染细胞平均分配到两个培养盘中，一盘加入...

【简答题】Erica: Hi, Daniel. What’s your plan for your future? Daniel: I would like to ___________________. Erica: What business will you do? Daniel: As you know, I _________________ software engineerin...

【单选题】在小范围内测制大比例尺地形图时,以( )作为投影面。

【简答题】So the man left France, _______ to give up the fortune that would one day come to him, _______ t35. So the man left France, _______ to give up the fortune that would one day come to him, _______ to li...

【判断题】They do business for 6 years.

【单选题】在机械图样中不能用细实线表达的是( )

【单选题】在机械图样上,不能用细实线表达的是()

【简答题】Playing is serious business for children. In fact, it’s what they do best! Ask them why they do it, and kids will probably say, “Because it’s fun!” But it’s much more than that. It’s also good for the...

【单选题】Cyrus is so successful that she made Forbes’ Celebrity 100 list last year ___she was number 35.

【单选题】在园林图纸中,不能用细实线表达的是: