问题
填空题
纳米材料和纳米技术的应用涉及现代工业的各个领域。用纳米级的某种氧化物做催化剂，可以使汽车尾气中的CO和NO迅速反应转化为两种气体，其中一种是空气中含量最多的气体。请你写出该反应的化学方程式__________________。
答案
2CO+2NO
2CO2+N2
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纳米材料和纳米技术的应用涉及现代工业的各个领域。用纳米级的某种氧化物做催化剂，可以使汽车尾气中的CO和NO迅速反应转化为两种气体，其中一种是空气中含量最多的气体。请你写出该反应的化学方程式__________________。
2CO+2NO2CO2+N2
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| In learning English, one should first pay attention to listening and speaking. It is the groundwork (基础) of reading and writing. You'd better 1 your best to speak while you do much listening. Don't be 2 of making mistakes. But be careful not to let them stop you from improving your 3 . While you are doing this, a good 4 is to write－keep a diary, write notes or letters. Then if you can, ask some others to go through 5 you have written and tell you where it is wrong. Many mistakes in your speaking will be 6 found when you wirte. Through correcting mistakes, you can do better in learning English. If you are slow in speaking, don't 7 about it. One of the helpful ways is reading, either aloud or to yourself. The important thing is to choose 8 interesting to read. It mustn't be too difficult for you. When you are reading 9 this way, don't stop to 10 the new words if you can guess their meanings when they have nothing to do with the sentences. You can do that some other time. | ||||
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