按要求写词。    

1．写出4个AABB式的词语（如：平平安安）                                                                                

2．写出4个ABAB式的词语（如：研究研究）                                                                                

3．写出4个ABCC式的词语（如：千里迢迢）                                                                               

4．写出4个ABAC式的词语（如：自言自语）                                                                               

水泥砼路面强度的控制指标是弯拉强度或（）。