写出下列反应的化学方程式．
（1）碳在氧气中充分燃烧
（2）二氧化碳气体使澄清的石灰水变浑浊
（3）煤气中的一氧化碳在空气中燃烧．
（1）碳在氧气中充分燃烧生成二氧化碳，化学方程式为C+O2
CO2； 点燃 .
（2）二氧化碳与氢氧化钙反应生成碳酸钙和水，化学方程式为CO2+Ca（OH）2=CaCO3↓+H2O；
（3）一氧化碳燃烧生成二氧化碳，化学方程式为2CO+O2
2CO2 点燃 .
故答案为：
（1）C+O2
CO2 点燃 .
（2）CO2+Ca（OH）2=CaCO3↓+H2O
（3）2CO+O2
2CO2 点燃 .
One day, two friends were walking through the desert.__36__ the journey they had a quarrel, and one friend hit __37__ one in the face. The one who was hit was hurt,__38__ he didn’t say anything. Instead, he wrote in the sand,“Today my best friend hit me in the face.” They kept on __39__ until they found an oasis(绿洲).They decided to get some water. The one who had been hit fell into the mire(泥潭) and was in danger, but the friend __40__ him. When he felt all right, he wrote on __41__.“Today my best friend saved my life.” The one who had hit and saved his best friend asked him,“After I __42__ you, you wrote in the sand and now you write on a stone.__43__” The other friend replied,“When someone hurts us, we should write it down in sand where winds of forgiveness(宽恕) can blow __44__ away. Bt when someone does something __45__ for us, we must write it in stone where no wind can ever blow it away.”
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