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  3. This passage explores how wildfires are born and live. In a wildfire, the main variable in ignition time is the ratio of the fu

This passage explores how wildfires are born and live. In a wildfire, the main variable in ignition time is the ratio of the fu

admin2009-04-23  3
问题 This passage explores how wildfires are born and live.
In a wildfire, the main variable in ignition time is the ratio of the fuel’s total surface area ______.
选项
答案to its volume
解析 由关键词variable in ignition time(燃点中的变量)可以锁定目标在Fueling the Flames小标题下，仔细查找可以看到这句话．the main variable in ignition time is the ratio of the fuel’s total surface area to its volume．故此处应填to its volume。
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大学英语四级

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