【求助】Advanced 300里面的一道题，看了解答依旧一头雾水

mortalnow

题目如下，请各位给给思路
Researchers in City X recently discovered low levels of several pharmaceutical drugs in public drinking water supplies. However, the researchers argued that the drugs in the water were not a significant public health hazard. They pointed out that the drug levels were so low that they could only be detected with the most recent technology, which suggested that the drugs may have already been present in the drinking water for decades, even though they have never had any discernible health effects.

Which of the following, if true, would most strengthen the researchers’ reasoning?

A. If a drug found in drinking water is not a significant public health hazard, then its presence in the water will not have any discernible health effects.
B. There is no need to remove low levels of pharmaceutical drugs from public drinking water unless they present a significant public health hazard.
C. Even if a substance in drinking water is a public health hazard, scientists may not have discerned which adverse health effects, if any, it has caused.
D. Researchers using older, less sensitive technology detected the same drugs several decades ago in the public drinking water of a neighboring town but could find no discernible health effects.
E. Samples of City X’s drinking water taken decades ago were tested with today’s most recent technology, and none of the pharmaceutical drugs were found.

AlanHeeee

是真题吗？为什么一点都搜不到

Young_Y_Y

是B吗？

61Wendy61

答案是D， 题目的逻辑是 drug的含量非常低只有最新的技术才能检测到，因此researcher推断这种drug可能长期存在，而至今没有发现有危害，所有认为drug没有危害。  漏洞：drug不一定长期存在； D：这种drug用老的技术可以在附近的town decades ago的水中检测到（即drug含量更高且长期存在），且没有造成危害， strengthen

申校小白

答案是D，
argument分析：However, the researchers argued that the drugs in the water were not a significant public health hazard.这句话是main conclusion。理由：however转折词，且后续都是这句话的论据，也就是premise。然后找最后一层逻辑链，文中结论后续出现有They pointed out.....which suggest that.......这个suggest是一个sub-conclusion，然后也是main conclusion的premise，简介起来就是：因为药物可能存在了好久且没有任何可以分辨的安全影响   推出   他不是重大的公共安全危害。然后ABC都是无关选项，且都把结论拿去假设，无关。D选项根据官方解释，就是旧的检测技术可以检测出水质里的药物（对比argument中说只有现在最新的技术才可以检测出物质，说明了以前可能含量更高，但是却没有任何可分辨的健康危害，所以以前含量高都没问题现在含量低肯定也没啥问题（注意虽然这里是neighboring，但是drug是一样的，比较的是含量而不是区域，所以不要用范围外轻易排除，他建立了相关性）

申校小白

答案是D，
argument分析：However, the researchers argued that the drugs in the water were not a significant public health hazard.这句话是main conclusion。理由：however转折词，且后续都是这句话的论据，也就是premise。然后找最后一层逻辑链，文中结论后续出现有They pointed out.....which suggest that.......这个suggest是一个sub-conclusion，然后也是main conclusion的premise，简介起来就是：因为药物可能存在了好久且没有任何可以分辨的安全影响   推出   他不是重大的公共安全危害。选项分析：ABC都是无关选项。D选项根据官方解释，就是旧的检测技术可以检测出neighboring水质里的药物（对比argument中说只有现在最新的技术才可以检测出现在的drug level，暗示了以前可能drug level更高，但是却没有任何可分辨的健康危害，所以以前含量高都没问题现在含量低肯定也没啥问题。）
（注意虽然这里是neighboring，但是drug是一样的，比较的是含量而不是区域，所以不要用范围外轻易排除，他建立了相关性）


E选项表示的是几十年前的样本用最新技术去检测没能检查到drug。暗示了drug可能是最近倒入，不能排除drug没有危险，against reasoning