题目

我们学过有多种途径可以制得氧气，如图所示： （1） 写出F途径制取氧气的反应的文字或符号表达式： （2） （填字母代号）途径发生的是物理变化，在发生化学变化的途径中，它们的基本反应类型是反应。（填化合或分解） （3） 为了使A、F两种途径更快地制取氧气，还需要加入。 （4） 根据“绿色化学”理念，通常（填字母代号）途径是实验室制氧气的最佳方法。阅读理解。        The police in the big city were looking for a thief. At last they caught (捉住catch的过去式) him. When they were taking photos of him from the front, from the left, from the right, with a hat, without (不戴) a hat, he suddenly attacked (袭击) the police and ran off. The police tried to catch (捉住) him, but he got away. A week later the telephone rang in the police station, and somebody said, “You are looking for Bill Cross, aren’t you? Well, he went to Waterbridge an hour ago.”Waterbridge was a small town 150 kms away from the city. Four photos of the thief were sent (送到) to the police in Waterbridge at once by (由) the city police.Not more than 12 hours later they got a call from the police station in Waterbridge, “We caught 3 of the man,” they said happily, “and we will catch the 4th this evening, we think.”1. In the passage, “somebody” may (可能) be           .A. the police in WaterbridgeB. someone in the cityC. the man taking photos         D. the thief himself2. The police in Waterbridge caught three of men according to (根据)           .A. the facts (事实)B. the phoneC. the photos   D. the news3. In fact (实际上) the police           the thief.A. caughtB. did not catch    C. were sure (确信) to catch   D. were not sure to catch4. The story happened (发生) in           . A. a city      B. a town      C. the country   D. A and B 5. Who made a ridiculous mistake (可笑的错误) in the passage?A. the police in the city        B. the thiefC. the police in Waterbridge    D. the police in the city