材料来自《新一代大学英语视听说教程1》第6单元。观看视频,并填写空格。 U6_2_1 截取视频.mp4 Lead-in question Will we use a very special kind of mosquito to kill malaria? The mosquito carries a 1__________ weapon. Malaria kills 2_______ people every year. Arguments for the use of CRISPR Claims: It shortens genetic engineering work from years to 3_______. It reduces the 4_________ of each experiment. It's easy for a person with the background in genetics to learn the 5_______ in a day or two. Example A genetic change is delivered to protect mosquitoes from the malaria parasite so that they can't spread it to 6_________. Counterarguments to the use of CRISPR Problem1: How to get the gene to spread through an 7_______ population of mosquitoes. Solution1: A gene 8_______ can push the changes to almost 100 percent of offspring. Problem2: Whether it is appropriate to take over the 9_______ of life on Earth. Solution2: Scientists have agreed on some basic 10______ to ethical CRISPR research. Conclusion It may become unethical to keep the window closed on some of this technology in the near future.