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标题: 请教CR [打印本页]

作者: faster727 时间: 2009-6-11 16:02
标题: 请教CR

1. 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.

(D) The total weight of glass bottles purchased by households increased at a slightly faster rate than the total weight of aluminum cans.

(E) In many areas, glass bottles had to be sorted by color of the glass before being recycled, whereas aluminum cans required no sorting.

答案是C。为什么呀。。。请问！

作者: xfi883 时间: 2009-6-11 16:27
本题是问：most helps。 BDE可以轻易排除。A和C两个哪个最好？玻璃瓶再重也不能没有限度的减少，而如果说玻璃瓶被塑料瓶代替，则从根本上减少了玻璃瓶的重量。

作者: faster727 时间: 2009-6-11 17:33
呵呵我就是选了A的。明白了谢谢哈^_^

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