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外语
The ozone layer (must be protected) because (it) shields the Earth (from) excessive ultra-vilolet (radiations).
The ozone layer (must be protected) because (it) shields the Earth (from) excessive ultra-vilolet (radiations).
admin
2008-10-11
55
问题
The ozone layer (must be protected) because (it) shields the Earth (from) excessive ultra-vilolet (radiations).
选项
A、must protected
B、it
C、from
D、radiations
答案
D改为radiation
解析
radiation辐射,放射,是不可数名词。
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考博英语
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