請注意這題是有結論句的weaken題，結論句在此用the reasoning，注意你要去weaken 的東西是the reasoning。 這邊的結論句因果關係如你所說的 disease ----- decline 你現在要去weaken的應該是這裡的因果關係，D選項雖然說的有道理，但請問 和the reasoning有何關係?? 這就是大陸人所說的無關，注意問句用the這個字代表出題者假設你知道他所說的 reasoning所指為何。 ※ 引述《lovekyoko (匹茲堡的天空)》之銘言： : 22. (28829-!-item-!-188;#058&003748) : In the late 1980s, the population of sea otters in the North Pacific began to : decline. There are two plausible explanations for the decline: predation, : possibly by killer whales, or disease. Of these two, disease is the more : likely, since a concurrent sharp decline in populations of seals and sea : lions is believed to have been caused by disease, and diseases that infect : these creatures are likely to be able to infect sea otters also. : Which of the following, if true, most seriously weakens the reasoning? : (A) Killer whales in the North Pacific usually prey on seals and sea lions : but will, when this food source is scarce, seek out other prey. : D) Following the decline in the population of the sea otters, there was an : increase in the population of sea urchins, which are sea otters' main food : source. : 請教一下 : 答案是A 沒啥問題 : 但我想知道D錯哪 : 因為題目說有2可能原因 (1)predation (2)disease : 題目尾巴說是因為disease 所以反駁他不是因為disease是predation 這是A的 : D是錯哪哩 urchins 增 otter減好像也沒錯阿 : -------------------------------------------------------- : Prep 1-23 : From 1978 to 1988, beverage containers accounted for a steadily decreasing : percentage of the total weight of household garbage in the United States. The : increasingly widespread practice of recycling aluminum and glass was : responsible for most of this decline. However, although aluminum recycling : was more widely practiced in this period than glass recycling, it was found : that the weight of glass bottles in household garbage declined by a greater : percentage than the weight of aluminum cans. : Which of the following, if true of the United States in the period 1978 to : 1988, most helps to account for the finding? : (A) Glass bottles are significantly heavier than aluminum cans of comparable : size. : C) Manufacturers replaced many glass bottles, but few aluminum cans, with : plastic containers. : 答案C 我來看傷咖的解釋 重點在percentage : A是陳述事實 但我想問一下 我覺得我考試看到A就會想選 : 有人可以對A做一下解釋嗎 : 是不是 "事實" 的答案一定不能選 : 謝謝 --

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