题目

阅读下面短文，完成表格。Some people around you look so cool and happy, but you often feel lonely. Or the friends you have do not really understand you that make you feel lonely, too. So what can be done when you have this feeling? Understand people’s differencesNot everyone has to do things the same way or behave the same way. Find people who have the same feeling. That is always a good basic for the friendship. You can take part in activities outside school like sports, art classes and dancing classes. There you can have more chances to find people who have the same interest as 用化学用语填空：（1）4个二氧化硫分子_________．（2）3个铁原子_________．（3）2个氢氧根离子_________．（4）在氯酸钾中氯元素显正5价_________．（5）用于配制生理盐水的氯化钠是由_____和_____构成的．