选择题:下列说法中,正确的是:( )。(本题3.5分) A、 滴定反应的外观特征必须明显 B、 滴定反应的速

题目内容:
下列说法中,正确的是:( )。(本题3.5分)
A、 滴定反应的外观特征必须明显
B、 滴定反应的速度要足够迅速
C、 计量点时溶液的pH=7
D、 终点误差是终点时多加半滴标液所引起的误差
参考答案:

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4. There have been many ___________ in their marri

4. There have been many ___________ in their marriage but they still love each o

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