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【单选题】
污染强碱性阴离子交换树脂的铁盐，主要来源于（）。A.
进水
B.
反洗水
C.
再生液
D.
交换器腐蚀产物
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举一反三
【简答题】One day a police officer managed to get some fresh mushrooms(蘑菇). He was so 26 with what he had bought that he offered to 27 the mushrooms with his brother officers. When their breakfast arrived the n...
【简答题】某桥梁工程，承包商在桥梁基础施工的具体方法如下： 1．基坑开挖采用混凝土加固坑壁进行施工。 2．对围堰的施工采用双壁钢围堰施工。 3．基坑排水施工采用帷幕法，并详细制订了排水管道的布置方式。 4．地基加固时，采用钢筋混凝土短桩将基础范围内的地基土挤密，使地基土与桩体形成复合地基，达到地基加固的目的。 明挖基础施工的方法除混凝土加固坑壁开挖方法外，还有哪些方法?
【单选题】One day a police officer managed to get some fresh mushrooms. He was so pleased 【C1】______ what he had bought that he 【C2】______ to share the mushrooms with his brother officers. When their breakfast ...
A.
of
B.
about
C.
with
D.
at
【简答题】One day a customs officer managed to get some fresh mushrooms(磨菇). (一天一海关官员想要一些新鲜蘑菇。) He was so __21__ what he had bought that he offered to share the mushrooms with his brother officers. When their b...
【简答题】Some mushrooms are edible; some are ____________(poison).
【单选题】One day a police officer managed to get some fresh mushrooms. He was so【C1】______what he had bought that he offered to【C2】______the mushrooms with his brother officers. When their break- fast arrived ...
A.
sure of
B.
careless about
C.
pleased with
D.
disappointed at
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