三大制胜原则攻克四级阅读理解
生在解答该题时,可利用题干中的专有名词Federal Aviation Authority将答案范围定位至文章倒数第二段最后一句:“The same year, the Federal Aviation Authority required that the boxes, which were never actually black, be painted orange or yellow to aid visibility.”显然,该句中的to aid visibility是该题的答案所在位置。通过将之与选项对照,
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