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【多选题】
沉淀滴定分析法对滴定反应的要求有A.
待测物质当中不能有杂质干扰反应
B.
反应必须迅速、定量完成
C.
有适当简便的方法确定化学计量点
D.
沉淀的溶解度必须很小
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反馈参考答案：
举一反三
【简答题】单层门式刚架结构有什么特点?
【简答题】小红参加歌唱比赛,五位评委的打分分别为93,97,95,94,96,请问小红的平均得分是多少?
【单选题】The study at a University of Florida indicated that ______.
A.
people of normal weight enjoyed longer lifespan than obese people
B.
the overweight people at 65 lost more on health-care over the rest of their lives
C.
the overweight people would cost 6~ to 13~ more than normal people
D.
the overweight people paid more health-care insurance than normal people
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