-
最佳答案：As long as the problem appeared to the timely processing or too late to regret.
-
最佳答案：The system will be shut down in ten minutes, please deal with your task in progr
-
最佳答案：1.Customer relationship maintenance,new vehicle sales and service customers pay
-
最佳答案：my name is Lin Tao.I always have a dream to own a robot in 2008 named Superman.I
-
最佳答案：解题思路：（1）将出射光线延长，然后结合出射光线与入射光线平行，出射光线相对于入射光线向下发生偏折的特点即可判定；（2）根据插针法测定玻璃砖折射率时的几点注意事