Which of the following did the author probably suggest? [A] Support not the most supported. [B] Deny everything others believe. [C] Throw all tradition into trashcan. [D] Keep your eyes open all the time.
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参考答案:
举一反三
【单选题】铬黑 T , 它是一种三元酸,它既是金属指示剂也是酸碱指示剂,其电离平衡和色变如下: H 2 In - ≒ HIn 2 - ≒ In 3 - 红色 蓝色 橙色 pH : 12.0 铬黑 T 应用于 EDTA 滴定中的 pH 条件为: