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  3. What was scientists’ understanding of methane? Which statement is true of the methane emissions of plants in the experiment?

What was scientists’ understanding of methane? Which statement is true of the methane emissions of plants in the experiment?

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问题 What was scientists’ understanding of methane?
Which statement is true of the methane emissions of plants in the experiment?
选项 A、The lower the temperature, the higher the amount of methane emissions.
B、Living plants release less methane than dried plants at the same temperature.
C、When exposed to sunlight, plants stop releasing methane.
D、The higher the temperature, the greater the amount of methane emissions.
答案D
解析 根据第四和第五段的内容，只有D是正确的说法。温度越高沼气的释放量越高，有生命的植物释放的沼气远大于干植物的释放量，在阳光下，它们的沼气释放量是正常情况的三倍。
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