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Sewage and water systems are the main problems of Columbus.A．YB．NC．NG
Sewage and water systems are the main problems of Columbus.
A．Y
B．N
C．NG
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
Sewage and water systems are the main problems of Columbus.
A．Y
B．N
C．NG
如果结果不匹配，请 联系老师 获取答案
更多“Sewage and water systems are t…”相关的问题
The water in this part of the river has been contaminated by sewage (污水)
A．polluted
B．downgraded
C．mixed
D．blackened
The water in this part of the river has been contaminated by sewage(污水)．
A．polluted
B．downgraded
C．mixed
D．blackened
The water in this part of the river has been contaminated by sewage (污水).
A．polluted
B．downgraded
C．mixed
D．blackened
The water in this part of the river has been contaminated by sewage (污水).
A．polluted
B．downgraded
C．mixed
D．blackened
According to the passage, most water pollutants come from .
A. raw sewage
B. toxic chemicals
C. algae
D. household waste
The water in this part of the river has been contaminated by sewage (污水).（）
A．polluted
B．downgraded
C．mixed
D．blackened
Which of the following is true？ __________
A．The sewage pipes built by the Romans are no longer in use now.
B．Sewage pipes in Arabia were built by the Romans.
C．A sewage pipe still being used today in Rome was built 2,000 year ago.
D．The ancient.Romans got their drinking water from underground pipes.
The water in this part of the river has been contaminated by sewage (污水).
A．polluted
B．downgraded
C．mixed
D．blackened
The passage is mainly about______.
A．urban solid waste disposing program
B．rural waste disposing and water sewage treatment
C．rural environment pollution and damage
D．urban environment pollution and damage
