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题库 / Prep2007E1-CR-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?
Glass bottles are significantly heavier than aluminum cans of comparable size.
Recycled aluminum cans were almost all beverage containers, but a significant fraction of the recycled glass bottles had contained products other than beverages.
Manufacturers replaced many glass bottles, but few aluminum cans, with plastic containers.
The total weight of glass bottles purchased by households increased at a slightly faster rate than the total weight of aluminum cans.
In many areas, glass bottles had to be sorted by color of the glass before being recycled, whereas aluminum cans required no sorting.
废弃的饮料瓶下降因为铝和玻璃瓶回收率上涨。
因为铝比玻璃瓶回收的范围广，所以垃圾里玻璃瓶重量下降的百分比比铝下降的快。所以要找支持玻璃瓶在垃圾里减少的选项。
A 原文说的是重量下降的百分比 和基数无关
B 和玻璃瓶中含有什么无关
C 玻璃瓶被塑料代替了，所以回收和垃圾里都会少。（他因，指出玻璃瓶减少的另一个原因）
D 购买的玻璃瓶总重量增长比比铝要快（百分比多不等于基数大）
E 无关
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