2017年4月23日托福阅读机经小范围预测

　　今天2017年4月23日小范围预测，尤其是一些重点话题的分析和相关背景资料的积累，如果掌握了这些内容会帮助大家顺利进行托福阅读考试的。下面来分析一下吧!

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　　内容主题：环境类话题

　　主要讲述森林大火对于森林的好处，包括：促进循环，光照。如果长久没有火灾，就意味着更强大的火势。

　　并且举出黄石公园大火的例子，失火后长出了许多新物种。

　　难度分析环境类话题，文章结构是分类列举的结构，框架结构清晰，但唯一麻烦的是与考生的常识略微有小出入，考生在备考期间还是需要注意素材知识的积累。

　　相关背景内容The Yellowstone fires of 1988 together formed the largest wildfire in the recorded history of Yellowstone National Park in the United States. Starting as many smaller individual fires, the flames quickly spread out of control with increasing winds and drought and combined into one large conflagration, which burned for several months. The fires almost destroyed two major visitor destinations and, on September 8, 1988, the entire park was closed to all non-emergency personnel for the first time in its history.[1] Only the arrival of cool and moist weather in the late autumn brought the fires to an end. A total of 793,880 acres (3,213 km2), or 36 percent of the park was affected by the wildfires.[2]

　　Thousands of firefighters fought the fires, assisted by dozens of helicopters and fixed-wing aircraft which were used for water and fire retardant drops. At the peak of the effort, over 9,000 firefighters were assigned to the park. With fires raging throughout the Greater Yellowstone Ecosystem and other areas in the western United States, the staffing levels of the National Park Service and other land management agencies were inadequate for the situation;over 4,000 U.S. military personnel were soon brought in to assist in fire suppression efforts. The firefighting effort cost $120 million ($240 million as of 2014). No firefighters died while fighting Yellowstone fires, though there were two fire-related deaths outside the park.

　　内容主题：社会学类话题

　　从巴洛克和文艺复兴开始讲述欧洲城市设计的历史。

　　最初的城市设计是为了炫耀领地和权势，以巴黎为例子来说明更有效率。其次人性化的设计增加了绿化面积，注重效率，像机器一样的城市。

　　最后讲述国际化，都是水泥和玻璃，城市开始变得相似。

　　难度分析：社会学类话题，对比类文章结构。

　　本文是2017年4月23日托福阅读机经小范围预测，将重点托福阅读话题分类，然后整理一些相关素材会对大家有一定帮助的。