标题: 大全-15-15,i am totally lost !!! [打印本页] 作者: luckyhaohuan 时间: 2013-1-4 07:28 标题: 大全-15-15,i am totally lost !!!
15. One variety of partially biodegradable plastic beverage container is manufactured from small bits of plastic bound together by a degradable bonding agent such as cornstarch. Since only the bonding agent degrades, leaving the small bits of plastic, no less plastic refuse per container is produced when such containers are discarded than when comparable nonbiodegradable containers are discarded.
Which of the following, if true, most strengthens the argument above?
(A) Both partially biodegradable and nonbiodegradable plastic beverage containers can be crushed completely flat by refuse compactors.
(B) The partially biodegradable plastic beverage containers are made with more plastic than comparable nonbiodegradable ones in order to compensate for the weakening effect of the bounding agents.
(C) Many consumers are ecology-minded and prefer to buy a product sold in the partially biodegradable plastic beverage containers rather than in nonbiodegradable containers, even if the price is higher.
(D) The manufacturing process for the partially biodegradable plastic beverage containers results in less plastic waste than the manufacturing process for nonbiodegradable plastic beverage containers.
(E) Technological problems with recycling currently prevent the reuse as food or beverage containers of the plastic from either type of plastic beverage container.
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what's ets talking about ?作者: luckyhaohuan 时间: 2013-1-4 07:29
no less plastic refuse per container is produced when such containers are discarded than when comparable nonbiodegradable containers are discarded.
尤其是这句话，怎么理解啊，晕菜作者: weidehou 时间: 2013-1-4 21:47
呵呵，这是一个计算题来着
原来的降解塑料是由很多小颗粒和胶水共同组成的，降解以后只剩下小颗粒了，而原文说最后经过降解以后两种塑料的体积相同吧
那么这里就有一个问题，可以降解的塑料除了小颗粒还有一堆胶水呢，所以如果把胶水加上去的话，总体积就要比不可降解的大咯
举个例子，有100个体积的小颗粒，还有100个体积的老塑料，这两个的体积都是在降解之后的体积，是相等的。
但是在降解之前是相等的吗，当然不是，肯定是降解塑料的还要多一些，因为里面还有胶水啊
这样 partially biodegradable plastic beverage containers are made with more plastic than comparable nonbiodegradable ones
你再想想吧，呵呵作者: melodyflying 时间: 2013-1-6 06:45
