____those poor children．

    It was Sunday yesterday. The weather was fine. It was sunny and there were no clouds in the sky. Sandy and Sue got up early in the morning. Now they were in the park. It is a big park and it's so beautiful. They saw many people there. Some boys played football on the grass. Some girls danced under the tree. An old man walked beside the lake. A young woman and her little son looked at the fish in the lake. How happy they are!

如果用动物的细胞进行克隆实验应该选择的细胞核不能来源于（   ）

读中东图，完成下列各题：

本区一直成为全世界关注的热点地区，冲突、战争不断，其原因有：