正确答案: B

海事行政主管部门

题目：载运具有污染危害性货物进出港口的船舶必须事先向()申报，经批准后方可进出港口。

解析：B

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学习资料的答案和解析：

[单选题]第三组：The sewage treatment system must be capable of discharging an effluent that comes within the limits of the tests. Sewage can be treated biologically so that it may be discharged with minimal damage to ecosystem. Biological treatment involves the use of living organisms to treat the sewage within the sewage treatment plant so the liquids and sludge discharged are within the standards specified.

biological sewage treatment system

[单选题]活塞销的损坏形式主要是_______

磨损和裂纹