Modern technology is harmful to the natural environment because . Processing sewage requires large quantities of .

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问题 Modern technology is harmful to the natural environment because ______.
Processing sewage requires large quantities of ______.

选项 A、water
B、electricity
C、gas
D、oil

答案B

解析第五段第一句明确指出：“处理污水需要大量的电”，故答案选B。

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成人本科学位英语

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