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大全-20-7. It is better for the environment if as much of all packaging as possible is made from materials that are biodegradable in landfills. Therefore, it is always a change for the worse to replace packaging made from paper or cardboard with packaging made from plastics that are not biodegradable in landfills. Which of the following, if true, constitutes the strongest objection to the argument above? (A) The paper and cardboard used in packaging are usually not biodegradable in landfills. (B) Some plastic used in packaging is biodegradable in landfills. 和前提相反。 (C) In many landfills, a significant proportion of space is taken up by materials other than discarded packaging materials. (D) It is impossible to avoid entirely the use of packaging materials that are not biodegradable in landfills.(A) (E) Sometimes, in packaging an item, plastics that are not biodegradable in landfills are combined with cardboard.
如果b项改为所有的塑料都是可降解的话,当然是答案,因为其两个论据一为纸板可降解,一为塑料不可降解,前提是为了环境,所以反对哪一个论据都会削弱其结论。 1。原文推理中最大的问题在于:不知道paper and cardbord 生物可降解性怎样。不知道这信息就无法下结论。B严格讲是OUT OF SCOPE。因为原文结论是用不能降解的塑料去替代。跟能降解的塑料无关。
大家把b 看成是无关,还是否定前提,或者是some没有代表性??? 以上2个意见都是nn views. so which one do you prefer? |