题目

A、B、C、Ｄ均为中学化学中常见的单质或化合物，它们之间的关系如右图所示（部分产物略去）。（1）   若A为非金属单质，D是空气的主要成分之一。它们之间转化时能量变化如下图，请写出反应的热化学方程式：______________________________________________________。（2）若A为金属单质，D是某强酸的溶液，则反应的离子方程式是____________________________。（3）若A、B为盐，D是强碱，A的水溶液显酸性，B的水溶液显碱性。①C的化学式为________________。②反应的离子阅读短文，根据短文内容回答问题。（共10分，每小题2分）Confidence is very important in daily life. It can help you to develop a healthy attitude. A study shows that the people who are more confident are much happier. They can have more chance to make themselves successful. But how to be more confident? Here are some suggestions: Speak loud   When you are not confident, you can’t do well what you want to do. You speak in a voice so low that other people can hardly hear you. Try to speak loud enough so that people can hear you clearly. The high voice can help you become more confident. Play sports   Physical exercise makes you tired but completely relaxed. A strong body helps you be full of confidence. Encourage yourself  Write down a list of things you did during the day to see how many things you have done well. Did you finish your homework? Did you tell a joke that made everybody laugh? Give yourself praise for the good things you’ve done. Get rid of (消除) fear  Fear comes along with failure. But it’s easy to overcome (克服) if you know that failure is part of your life. Don’t hide your head just because you said something stupid last time. Try to start again and believe you can do better. Pick up a hobby   If you like singing, sing as much as you can. In some ways, a hobby can make you outstanding. And it will make you happy and confident.1.Is confidence important in daily life?2.How many suggestions can help you to be more confident?3.Which can help you be more confident, speak in a low voice or speak loud?4.How can you encourage yourself?5.What’s the passage mainly about?