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If your speech is on environmental problems， what kind of subtopic might be relatively new and novel？

If your speech is on environmental problems， what kind of subtopic might be relatively new and novel？
A.pharmaceutical pollution
B.thermal pollution
C.air pollution
D.visual pollution
E.water pollution
F.noise pollution
正确答案：pharmaceutical pollution；thermal pollution；visual pollution

标签：英语演讲与辩论

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