Dump sewage into oceans and rivers is a serious form of pollution. A: Having dumped sewage B: Being dumped sewage C: Dumped sewage D: Dumping sewage

Which of the following operation is correct?______. A: After being treated in the bio-filter tank, the sewage is discharged overboard B: After going through the biological film, the sewage is discharged overboard C: The sewage treated in the bio-filter tank flows into the sterilization compartment D: The sewage is first collected in sterilization tank then discharged into the bio-filter tank.

Biological sewage treatment plant work on the ______.: aeration process|centrifuging process|heating process|settling process

affects people immediate environments and leads to water related illnesses.(Sewage disposal / Processing waste gases)

_____ is NOT pollution prevention equipment. A: Oily water separator B: Sewage treatment plant C: Fuel oil separator D: Incinerator

Please find the word that is equivalent to the definition.fit for drinking（） A: sewage B: vegetation C: potable D: drainage E: waterlogged F: sedimentG．habitatH．erosion

To improve the （）is regarded as a good method to increase the farmer's income in the south part of the country. A: sewage B: drainage C: aqueduct D: archway

All of the following made the Thames cleanup a success EXCEPT ______. A: rising public concern about the environment B: the expansion of sewage treatment works C: no commercial fishing in the lower stretches ofthe river D: new laws to stop industry from dumpingchemical waste into the river

The most important crucial question is what causes water pollution A: Natural disasters such as volcano eruptions B: Animal waste C: Residues from storms and floods D: Every day sewage E: Garbage F: Oil spills G: Fossil fuels combistion H: Chemical fertilizers I: Pesticides

Which of the items are exempted from environmental protection tax? A: Taxable pollutants discharged by large-scale farms B: Taxable pollutants discharged by mobile pollution sources such as boats and aircrafts C: Sewage discharged directly to the environment by a school D: Solid waste comprehensively utilized by taxpayers that conforms to the national and local environmental protection standards