陈向东p103-21

wangliming

government bans on the dumping of sludge anywhere in the ocean are based on the belief that the spread of sludge by ocean currents poses a danger to people.since it is not clear that sludge dumped on the ocean bottom, far from coasts,would endanger people, the bans should be revised to apply only to coastal waters
each of the following, if true, supports the conclusion that the bans on ocean dumping should be revised except
D)dumping large amounts of sludge would have an unknown effect on organisms that live on the ocean bottom.
E)the technology exists to lower sewage sludge to ocean bottom dump sites without contaminating waters closer to the surface.
答案D
不好意思，打字慢了，就只把我有疑问的发出来了.
E)既然有这种技术可以不让表面的水受到污染，那么不是就不用ban了吗？不就不支持conclusion了吗。所以我就认为E 也是对的，谢谢各位了

xiangxiangling

我自己来踩踩哈，是不是题目给的

不知道海底是不是会有影响——要禁令排放到表面

D选项就针对这个premise“不知道海底是不是会有影响”提出了质疑，说海底会受到影响

E为什么不对了，难道与题目链接不紧密，不好意思，真的很需要大家帮忙，谢谢

hedgeforfu

E项说明倾倒在海底的sludge不会spread，所以不用ban，所以supports the conclusion that the bans on ocean dumping should be revised to apply only to coastal waters

D项我认为是无关，所以不support结论

wangliming

谢谢了，今天回来就赶紧看了

嗯，谢谢NR帮我解答。还以为不会收到呢

逻辑的确被打击了