皮皮学，免费搜题
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【单选题】
欲将蛋白质从水中析出而又不改变它的性质应加入:A.
甲醛溶液
B.
硫酸铜溶液
C.
饱和硫酸钠溶液
拍照语音搜题，微信中搜索"皮皮学"使用
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【多选题】上报达标投产和优质工程的项目应按现行国家、行业及公司的技术规范、质量标准及相关规定组织施工，并认真开展施工和调试质量的检验及评定，工程质量总评为优良，且满足（）。
A.
变电站土建分项工程合格率100%，分部工程合格率100%，单位工程优良率100%，观感得分率≥95%
B.
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C.
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D.
输电线路分项工程优良率100%，分部工程优良率100%，单位工程优良率100%
E.
输电线路分项工程优良率100%，分部工程优良率100%，单位工程优良率≥90%
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