单选题
综合类
2016-02-18
Paragraph 4 __________
A．Life of Microscopic Bacteria in Livestock's Rumen
B．Ways to Reduce Methane's Heat-Trapping Power
C．Agriculture Also Contributes to Increased Concentrations of Methane in the Atmosphere
D．Why Livestock Releases Methane
E．Methane as a Strong Greenhouse Gas
F．Livestock as a Prime Factor of the Greenhouse Effect
参考答案
C
答案解析
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A．Life of Microscopic Bacteria in Livestock's Rumen
B．Ways to Reduce Methane's Heat-Trapping Power
C．Agriculture Also Contributes to Increased Concentrations of Methane in the Atmosphere
D．Why Livestock Releases Methane
E．Methane as a Strong Greenhouse Gas
F．Livestock as a Prime Factor of the Greenhouse Effect
A．one of the major contributors
B．the ever-increasing atmospheric concentrations of greenhouse gases
C．big and hefty cows
D．livestock's normal digestion process
E．how to cut down the cattle populations
F．big industries and gas-guzzling vehicles
3
Greenhouse gases are indispensable to mankind, but the problem mankind is faced with is __________.
A．one of the major contributors
B．the ever-increasing atmospheric concentrations of greenhouse gases
C．big and hefty cows
D．livestock's normal digestion process
E．how to cut down the cattle populations
F．big industries and gas-guzzling vehicles