一共五道题,前三个oq,英文回答,后两个case,中文回答 an example of the committment you made to others an example of the responsibility you take of your mistake your expectations of DuPonds NCG program4.税收缩小城乡贫富差距的可行性和有效性,还有什么其他的方法可以缩小差距5.有的药疗效好,毒性低,但是太便宜没人生产导致停产了,请你给出方案