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因果推理:
原因:since the presence of large numbers of tourists tends to accelerate the deterioration of a site,
结果:installation of the cable car is certain to result in harm to the ruins.
要削弱,就是要说明在选项的条件下原因当中的一个特点使得结论的可信度降低,或者选项使得原因产生多个无法共存的结果
A. The daily number of tourists that are expected to take the cable car to Machu Piccu is smaller than the original resident population of Incas. 只提到了原因,没提到因果联系
B. The construction of the cable car terminal at Machu Picchu will require the use of potentially damaging heavy machinery at the site.只提到了结果, 没提到因果联系
C. Machu Picchu is already one of the most popular tourist sites in Peru. 只提到了现在人多,完全没提到因果联系
D. Natural weathering will continue to be a more significant cause of the deterioration of Machu Picchu than tourist traffic. 看似是一个更严重的他因,但是在因果推理下,他因必然不是答案,原题是说A一定导致B,削弱只能是A一定导致C,或者A不一定导致B,而说C一定导致B与原题无关
E. The cable car will replace the tour buses whose large wheels and corrosive exhaust at present do significant damage to the site. 正确,把该项扔到因果之间,由于原因中游客accelerate the deterioration of a site这个特点被cable car replace了一些,于是A+这个选项不一定还能得到B。 |
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