methanen.甲烷,沼气 emissionn.散发,发射
Celsius n..adj.摄氏(的) bacterian.细菌
biogeochemist n.生物地球化学家 chambern.室,房间;腔
1. the Max Planck Institute for Nuclear Physics in Heidelberg,Germany:马克思普朗克核物理研究所,位于德国海德堡。海德堡系德国西南部城市,在巴登一符腾堡州的内卡河畔。海德堡大学是德国历史最悠久的大学。
3. St.Paul:圣保罗,美国明尼苏达州首府。
1. What was scientists understanding of methane?
B It was not a greenhouse gas.
D It traps more heat than any other greenhouse gas.
A a oxygen-free environment.
C a carbon dioxide-free environment.
3. Which statement is true of the methane emissions of plants in the experiment?
B I.iving plants release less methane than dried plants at the same temperature.
D The higher the temperature,the greater the amount of methane emissions.
A Plants growing in soil release methane.
C Soil microbes consume methane.
5. What is the beneficial point of some microbes consuming plant-produced methane?
B Methane is turned into a fertilizer.
D Air becomes cleaner.
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