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【单选题】
酸碱滴定中选择指示剂的原则是( )。A.
指示剂的变色范围应全部落在突跃范围内
B.
指示剂应在pH=7时变色
C.
指示剂的变色点应与化学计量点重合
D.
指示剂的变色范围应全部或部分落在突跃范围内
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】在固定汇率制度下，当本币出现贬值迹象时，该国可能采取的政策手段是( )。
A.
央行提高贴现率
B.
限制外汇支出，或借入外债
C.
在外汇市场上抛出外币买入本币
D.
降低关税税率
E.
在外汇市场上抛出本币买入外币
【简答题】Watch Conversation 1 again and check ( √ ) the true statements according to the clip. □ 1. Janet plans to go back to China and become a teacher. □ 2. Andy plans to leave London and go to China next ye...
【简答题】Here are two articles written by Chinese students. Read them and give your comments. Text 1. Since our country carried out the plan of controlling the number of the children of a family, that is: one ...
【简答题】Here is an article written by Chinese students. Read them and give your comments. Text 1. Since our country carried out the plan of controlling the number of the children of a family, that is: one fam...
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