【单选题】听力原文:W:You wouldn't be interested in working this summer to make some extra money,would you? M:Not much,1 wouldn't.And this summer I have a vacation plan. Q:What does the man mean? (19)
【简答题】PCR时,在样品的收集、抽提和扩增的所有环节都应该注意:( )A. 使用一次性吸头,严禁与PCR产物分析室的吸头混用,吸头不要长时间暴露于空气中,避免气溶胶的污染; B. 避免反应液飞溅,打开反应管时为避免此种情况,开盖前稍离心收集液体于管底。若不小心溅到手套或桌面上,应立刻更换手套并用稀酸擦拭桌面; C. 操作多份样品时,制备反应混合液,先将dNTP、缓冲液、引物和酶混合好,然后分装,这样即可以...