OG CR49. Certain genetically modi?ed strains of maize produce a powerful natural insecticide. The insecticide occurs throughout the plant, including its pollen. Maize pollen is dispersed by the wind and frequently blows onto milkweed plants that grow near maize ?elds. Caterpillars of monarch butter?ies feed exclusively on milkweed leaves. When these caterpillars are fed milkweed leaves dusted with pollen from modi?ed maize plants, they die. Therefore, by using genetically modi?ed maize, farmers put monarch butter?ies at risk. Which of the following would it be most useful to determine in order to evaluate the argument? 再帖一个OG的CR题,GMAC自己用的by using。。。 -- by 会员 幸运四叶草 (2011/10/26 22:57:38)
赞! 也希望大家多多重视语义层面的问题,而不是纠结于by using, by the use of 到底合不合法的问题。 |