2. 外语
  3. ModemMachines only bring people problems. FactoriesMust clean theirWater before it is thrown away.

ModemMachines only bring people problems. FactoriesMust clean theirWater before it is thrown away.

admin2009-06-21  50
问题 ModemMachines only bring people problems.
FactoriesMust clean theirWater before it is thrown away.
选项 A、Right.
B、Wrong.
C、Doesn’t say.
答案A
解析 文中提到工厂排水前开始进行净化处理的措施。
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