按要求写句子。

1．四周全是丝绒般的碧绿草原和黑白两色的花牛。

     缩句：                                                                                                

2．远处的几座灯塔在闪烁着微弱的光芒。

     缩句：                                                                                                

3．藤和叶构成了装饰。

     扩句：                                                                                                

指出铝电解质对铝电解的影响。