Last weekend we had a birthday for our classmate Zhang Xiaohui. She is younger than me, but I am shorter than her. And she looks stronger. Of course she is heavier than me. We went to a shop to buy a present for Xiaohui. What did we buy? We bought a doll for her. Because she told me " I haven't got a lovely doll." When she got our present she looked excited. She was very happy. We went to the zoo. We saw elephants. We wanted to row a boat in Jingming park, but it was later, we had to went home. We had a good time on that day.

设F₁（﹣4，0）、F₂（4，0）为定点，动点M满足|MF₁|+|MF₂|=8，则动点M的轨迹是（　　）

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        《战国策》主要记述了战国时期纵横家的政治主张和策略，展示了战国时代的历史特点和社会风貌。其文学成就非常突出，尤其在人物形象刻画方面，具有鲜明的艺术特色。如《 ①                        》 一文中，就紧紧围绕  ②                                              这一事件，展开对话描写，成功塑造了唐雎这一有胆有识的谋臣形象。运用语言描写不仅生动地刻画了主要人物，有时几句点染也使次要人物的性格跃然纸上，如《邹忌讽齐王纳谏》中，对  ③                         三个人的语言描写就精彩至极。