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【单选题】
下列有关分步沉淀的叙述正确的是( )。A.
积小者一定先沉淀出来
B.
沉淀时所需沉淀试剂浓度小者先沉淀出来
C.
溶解度小的物质先沉淀
D.
被沉淀离子浓度大的先沉淀
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反馈参考答案：
举一反三
【判断题】By the "Establishment", the writer does not only mean the centres of official power—though they are certainly part of it—but rather the whole matrix of official and social relations within which power...
A.
正确
B.
错误
【简答题】These letters tickled me, my heart flutter with the thought that I was not only a published writer but an opinion maker.
【判断题】When a writer deliberately uses someone else's ideas without acknowledging its sources, the writer can not be calle plagiarism, because he only uses the ideas.
A.
正确
B.
错误
【单选题】某肿瘤病区护士，准备为一肿瘤病人配备化疗药物，在配备药物前，该护士应做的准备是
A.
洗手，戴防护口罩、帽子、面罩，穿工作服外套、隔离衣，戴手套
B.
洗手，戴帽子、面罩、手套，穿隔离衣
C.
洗手，戴防护口罩、手套，穿隔离衣、鞋套
D.
戴口罩、手套，穿隔离衣、鞋套
E.
戴口罩、手套，穿工作服外套
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