A.60种
B.40种
C.30种
D.50种
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A.TOD﹥CODCr﹥BOD5﹥CODMn
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B.TOD﹥CODMn
A.15℃
B.35℃
C.25℃
D.20℃
A.城市居住环境
B.城市人均收入
C.城市经济发展
D.城市生态位
A.合理选择材料和改进机械设计。
B.改进工艺和操作方法。
C.利用隔声墙、隔声罩等隔声设备。
D.提高零部件间的接触性能。
A.产品—再生资源
B.废物—资源—产品
C.资源—产品—再生资源
D.废物—产品—再生资源
A.保护环境
B.经济增长
C.保护环境
D.经济增长
A.压实
B.焚烧
C.分选
D.固废资源化
A.生产配料
B.钢铁用保护渣
C.水泥
D.微晶玻璃
A.途径控制
B.介质控制
C.传播方式控制
D.隔声控制
A.6.5%
B.3.5%
C.5.5%
D.4.5%
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