23. (29107-!-item-!-188;#058&003854)
From 1978 to 1988, beveragecontainers accounted for a steadily decreasing percentage of the total weightof household garbage in the United States. The increasingly widespread practice of recycling aluminum and glass wasresponsible for most of this decline. However, although aluminum recycling was more widely practiced in thisperiod than glass recycling, it was found that the weight of glass bottles inhousehold garbage declined by a greater percentage than the weight of aluminumcans.
Which of the following, if true ofthe United States in the period 1978 to 1988, most helps to account for thefinding?
(A) Glass bottles are significantlyheavier than aluminum cans of comparable size.
(B) Recycled aluminum cans werealmost all beverage containers, but a significant fraction of the recycledglass bottles had contained products other than beverages.
(C) Manufacturers replaced manyglass bottles, but few aluminum cans, with plastic containers.
(D) The total weight of glassbottles purchased by households increased at a slightly faster rate than thetotal weight of aluminum cans.
(E) In many areas, glass bottleshad to be sorted by color of the glass before being recycled, whereas aluminumcans required no sorting.
题目说，铝罐回收比玻璃瓶回收更加广泛（也就是说，回收铝罐更多咯？），但是垃圾中玻璃瓶重量的减少比铝罐重量的减少更多。
选项A说，相同大小的铝罐，玻璃瓶，玻璃瓶重的多。那不是，回收相同数量的铝罐，或者更多的铝罐，还是有可能玻璃瓶重量减少的更多的呀。
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发表于 2011-5-15 11:46:36
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