barrymachine 发表于 2012-12-29 11:52
看了其他人的帖子我概括一下下:(A) While it costs about the same to run nuclear plants as other ty ...
我觉得barry说的很对,在此我来补充一下,如果有不对欢迎大家指正
——虽然前面zhima427的回复可以帮到大家明晰选项,但是并没有戳到本质
首先,五个选项可以分为两组
(1)ACD,开头结构都是it costs,其比较对象是to run different plants
(2)BE,开头是the costs of running,其比较对象是costs
我来把A、B选项的第一句话补充完整,大家就可以更好的看到区别了
A While it costs about thesame to run nuclear plants as other types of power plants,
——> to run nuclear plants costs about the same as (to run) other types of power plants
B While the cost of runningnuclear plants is about the same as for other types of power plants,
——> the cost of running n-plants is about the same as (the running costs) for other types ofpower plants
如果从语义来看,我们会发现,这道题想要比较的是cost本身。因为原句想要表达的是:
虽然运营成本基本一样,但是由于投建n-plant的固定成本高,因此n-plant发电总成本高。
因此答案只能集中在B和E中间选。
由于后一句已经省略了cost,那么介词结构for不能省略。
我们再回过头来看OG答案中提到for的问题的地方,应该就会觉得很清晰了:
D The preposition for is redundant in comparing the two objects of run. E The preposition for is necessary in the comparison of the costs.
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