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【多选题】
以下属于废水三级处理方法的有（）。A.
化学沉淀
B.
吸附
C.
电渗析
D.
离子交换
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反馈参考答案：
举一反三
【单选题】The forest was ______ to a few trees by the great fire.
A.
reduced
B.
lessened
C.
decreased
D.
restricted
【单选题】A few people were killed in the fire, but _____ were saved. [ ]
A.
the most
B.
most of whom
C.
the majority of whom
D.
the majority
【单选题】The alarm signal for engine room catching fire is a blast of random bell followed by _____.
A.
two
B.
three knocks
C.
four knocks
D.
five knocks
【单选题】______ is reported in the newspaper, the big fire was finally put out with very few injuries.
A.
What
B.
That
C.
As
D.
It
【单选题】The alarm signal for engine room catching fire is a blast of random bell follow by ____.
A.
two knock
B.
three knocks
C.
four knocks
D.
five knocks
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