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【多选题】
下列物质完全反应后，溶液由蓝色变成无色的是（ ）A.
锌和硫酸铜溶液
B.
铝和硫酸
C.
氯化铜溶液
D.
镁和氯化铜溶液
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反馈参考答案：
举一反三
【简答题】请模仿例句连词成句。 Ejemplo: Mi madre/hacer/la comida. Mi madre está haciendo la comida. 1. Mi padre/preparar/el café.
【简答题】“Cool” is a word with many meanings. Its old meaning is used to express a temperature that is a little bit cold. As the world has changed, the word has had many different meanings. “Cool” can be used ...
【单选题】-Which of the electronic dictionaries do you like most? -________.They are both expensive and of little use. [ ]
A.
None
B.
Either
C.
Neither
D.
Any
【简答题】Mi padre trabaja ________ IBM.
【简答题】Das Mädchen litt Autismus.
【简答题】When I was a litt1e girl , my brothers and I collected stamps for many years. My mother didn't use to work during the week , but she worked in the post office near our house on Saturdays , and she use...
【简答题】Mi padre me lleva la .
【单选题】—Which of those electronic dictionaries do you like most? — _____. They are both expensive and of little use. [ ]
A.
Both
B.
None
C.
Neither
D.
All
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