求教一道逻辑

lllmmm · 发表于 2011-6-16 09:41:45

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.
(B) Recycled aluminum cans were almost all beverage containers, but a significant fraction of the recycled glass bottles had contained products other than beverages.
(C) Manufacturers replaced many glass bottles, but few aluminum cans, with plastic containers..
答案是C？

camelo777 · 发表于 2011-6-16 09:57:23

从你给的这三个选项来看，C是正确的

MarsTOF · 发表于 2011-6-16 10:14:43

C 。。。

lllmmm · 发表于 2011-6-16 23:48:14

请问原因是什么啊各位高手！

colasama · 发表于 2011-6-16 23:56:27

因为回收利用。家庭垃圾中的glass 和aluminum都在减少。但glass减少地更快
原因？

C：现在很多glass都被plastic取代了。用得少了，自然就不会出现在垃圾当中

lllmmm · 发表于 2011-6-17 22:58:20

那A B为啥不对啊

MarsTOF · 发表于 2011-6-17 23:03:07

B products other than beverages. 没设计
A 说的是一个事实对文章不能起任何支持和削弱作用
不要用自己的想法推就用文中的逻辑链推

求教一道逻辑

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