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【简答题】
[名词解释] 镍币 niâ bì
题目标签：
镍币
举报
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参考答案：
参考解析：
刷刷题刷刷变学霸
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【简答题】阅读理解。 I began working in journalism when I was eight. It was my mother's idea. She wanted me to "make something" of myself, and decided I had better start young if I was to have any chance of keepi...
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【判断题】镍币中含有少量铜、银。欲测定其中铜、银的含量,有人将镍币的表层擦洁后,直接用稀HNO 3 溶解部分镍币制备试液。根据称量镍币在溶解前后的质量之差,确定试样的质量。然后用不同的方法测定试液中铜、银的含量。 此人的操作是否正确。( )填正确或错误
A.
正确
B.
错误
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【简答题】David came from a poor family. When he finished his high school, however, he was given a wonderful present. “Some of my friends got new clothes and a rich boy even got a new car,” he remembered, “My d...
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【简答题】镍币中含有少量铜、银，欲测定其中铜、银的含量，有人将镍币的表层擦洁后，直接用稀硝酸溶解部分镍币制备试液。根据称量镍币在溶解前后的质量之差，确定试样的质量，然后用不同的方法测定试液中铜、银的含量。这样做对不对，为什么?
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【简答题】I began working in journalism (新闻业) when I was eight. It was my mother’s idea. She wanted me to “make something” of myself, and decided I had better start young if I was to have any chance of keeping ...
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【简答题】假设在桌上有三个密封的盒,一个盒中有2枚银币(1银币=10便士),一个盒中有2枚镍币(1镍币=5便士),剩下一个盒中有1枚银币和1枚镍币。这些盒子被标上10便士、15便士和20便士,但每个标签都是错误的。允许你从一个盒中拿出1枚硬币放在盒前,看到这枚硬币,你能否说出每个盒内装的东西呢
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【简答题】阅读理解。 I began working in journalism when I was eight. It was my mother's idea. She wanted me to 'make something' of myself, and decided I had better start young if I was to have any chance of keeping ...
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【简答题】阅读理解 I began working in journalism(新闻工作)when I was eight. It was my mother's idea. She wanted meto "make something" of myself, and decided I had better start young if I was to have any chance of ke...
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【简答题】阅读理解。 I began working in journalism (新闻工作) when I was eight. It was my mother's idea. She wanted meto "make something" of myself, and decided I had better start young if I was to have any chance of...
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