按要求把下面成语归类。

无微不至  意气风发  见异思迁  眉开眼笑  气势汹汹    喜出望外 

古道热肠  心潮澎湃  斗志昂扬  严于律己  气宇轩昂    指挥若定

气急败环  克己奉公  心悦诚服  垂头丧气  满腔热忱    英姿焕发

1．描写人物优秀品质的：                                                                                                        

2．描描写人物精神风貌的：                                                                                                    

3．描写人物心理活动的：                                                                                                        

4．描写人物神态的：                                                                                                               

一只挂钟的分针长20cm，经过30分钟后，分针的尖端所走的路程是多少厘米？经过45分钟呢？