n. 污水；下水道；污物
望采纳
Chemicals in the factory'ssewagesystem have changed the ecol
1个回答
相关问题
-
Great changes have taken place since then in the factory ___
-
7.great changes have taken place since then in the factory _
-
Great changes___in the city,and a lot of factories have been
-
Great. changes. ( )in. the. city. ，and. a. lot. of. factorie
-
Great changes ______ in the city, and a lot of factories ___
-
________there are a large number of chemical factories, the
-
Yesterday we saw chemical factory _____ waste water into the
-
Great changes ______in the village after a new factory was b
-
Smoke from those chemical factories is __ to the villagers n
-
when ( )your father have lunch in the factory