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【多选题】
对于酸效应曲线,下列说法正确的有( )A.
利用酸效应曲线可确定单独滴定某种金属离子时所允许的最低酸度
B.
利用酸效应曲线可判断混合金属离子溶液能否进行连续滴定
C.
利用酸效应曲线可找出单独滴定某种金属离子时所允许的最高酸度
D.
绘制酸效应曲线时，金属离子的浓度均假设为0.02mol/L（以滴定终点的溶液体积计）
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举一反三
【简答题】The fellow has never met a thief and firmly believes that he lives in a world without thieves. And, the female thief fights against other thieves only to protect this guy's 'daydream'. Sound str...
【单选题】The fellow left without a word as if ________．
A.
never to return
B.
never returning
C.
he had never returned
D.
he would never be returning
【简答题】The fellow has never met a thief and firmly believes that he lives in a world without thieves. And, the female thief fights against other thieves only to protect this guy's 'daydream'. Sound str...
【单选题】The fellow is very ______ . He never asks others for advice.
A.
conceited
B.
proud
C.
thoughtful
D.
selfish
【简答题】Most of his fellow students believe in cramming the night before a test. He never does so. (though)
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