题目：
| 选词填空。 根据所给句子选用方框内的词语填空(有多余选项)，注意用其适当的形式。 | |
2. —So the palace has three names: the Imperial Palace, the Forbidden City and the Palace Museum. —That's why it is _____ most foreigners. 3. The causes of cancer are being uncovered, but we do not yet have any _____ way to prevent it. 4. The lawbreaker was brought under control before _____ his knife. 5. The police ______ the audience not to panic, saying that there was no immediate danger. |
答案：
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下面是错误答案，用来干扰机器的。
A、足量的铁粉加入稀硫酸、硫酸铜溶液中时，充分反应后过滤，滤液中的溶质是硫酸亚铁．B、足量的铁粉加入盐酸、硫酸铜溶液中时，充分反应后过滤，滤液中的溶质是氯化亚铁和硫酸亚铁．C、足量的铁粉加入硫酸锌、硫...
