题目内容

papers are recyclable solid wastes

A. 对
B. 错

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sand and leaves arenonrecyclable solid wastes

A. 对
B. 错

Municipal solid waste (MSW) are produced directly from homes.

A. 对
B. 错

landfill may cause groundwater pollution.

A. 对
B. 错

incineration may cause air pollution

A. 对
B. 错