[求助]prep1-23

crystalgan

23.   (29107-!-item-!-188;#058&003854)

 

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.

(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.

答案为C

请问选项B为什么不对呢？?

zsgc0011

B 是说铝罐全装饮料 而很大一部分玻璃罐装了其他的东东

文章是说饮料罐重量在垃圾总重量的比重的减少是由于回收引起的,虽然铝罐回收应用更广,但玻璃罐减少的比重更大

如果如B所说 那么玻璃罐的比重应该会比铝罐的比重变化得小,因为题目讨论的范围是饮料罐

ppjelly

不理解。怎么觉得B还是有点道理呢：（

lynn_ql

ok