第六章单元测试
- The value of COD is higher than BOD.（ ）
- Municipal and industrial sources are good examples of nonpoint sources.（ ）
- Groundwater is in saturated zone, which is under the water table.（ ）
- Agricultural sources are points sources. They are difficult to control.（ ）
- Thermal pollution is caused by cooling water from industry. （ ）
A:对 B:错
答案:对
A:错 B:对
A:对 B:错
A:错 B:对
A:错 B:对
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