将下列词语分类。 

1．无缘无故      古为今用      勃勃生机       举一反三   

     自由自在      娓娓动听      说一不二       津津有味   

     前思后想      群策群力      推三阻四       头头是道   

     左顾右盼      诚心诚意      南征北战   

     无缘无故                                                                                                         

     古为今用                                                                                                        

     举一反三                                                                                                      

     勃勃生机                                                                                                       

2．秉烛夜游      全神贯注        眼疾手快      拾金不昧 

     锲而不舍       指手画脚       垂头丧气      心旷神怡  

     目瞪口呆       胆战心惊       盛气凌人      迫不及待 

     (1)描写人物动作的：                                                                                   

     (2)描写人物神态的：                                                                                   

     (3)描写人物品质的：                                                                                   

     (4)描写人物心理的：                                                                                   

表面活性剂的两大性质是什么？如何解释？