[size=1em]172. There is a great deal of geographical variation in the frequency of many surgical procedures—up to tenfold variation per hundred thousand between different areas in the numbers of hysterectomies, prostatectomies, and tonsillectomies. |
我做这题选择b用了排除法+理解大概意思，但是读来读去，就觉得同位语缺了谓语
(B) The variation is unrelated to factors (other than the surgical procedures themselves) that influence the incidence of diseases for which surgery might be considered. that是factor的同位语吧，for which 是定语从句吧，influence还有 the inciddence of diseases都是名词成分吧， 是那个因素，而这个因素是指xxx影响了xxx, 动词呢？
这题做了很久，b觉得勉强选了。请高手提示下
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发表于 2018-2-3 06:54:12
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