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.
答案是 C
我選了 A
答案 C 怪怪的, 題目是講 重量 (weight), 答案 C 卻改提 數量,
怎麼還會正確呢???
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