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外语
The passage mainly discusses the factors leading to plastic bag pollution.. The petrol-based bags, though harmless to the envir
The passage mainly discusses the factors leading to plastic bag pollution.. The petrol-based bags, though harmless to the envir
admin
2009-09-12
58
问题
The passage mainly discusses the factors leading to plastic bag pollution..
The petrol-based bags, though harmless to the environment, cost too much in manufacture to become widely used.
选项
A、Y
B、N
C、NG
答案
B
解析
根据“Greenhouse Gases”部分第二段,生产成本昂贵的环保型塑料袋是以corn为生产原料,而非petrol-based。
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0
大学英语四级
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