如图，已知l₁∥l₂∥l₃，DE=4，DF=6，那么下列结论正确的是（　　）

阅读短文，从方框中选择适当的单词填空                                                                    

       Changqing has a long history but it is the new district of Jinan. It ____  in the west of Jinan. and covers 1178 square kilometers. The ____  of Changqing is about 530,000. It has convenient transportation ____  it's easy to get here. There are many ancient places of interest for you to visit, such as Lingyan Temple, Xiaotang Hill and so on. It has changed a lot since it became the new district of Jinan. Now it has 15 colleges or universities. You can make your ____ come true there. And the Expo garden which was built newly attracts thousands____ visitors every year. Welcome to Changqing, and you will enjoy yourself.

4，8，____，16，____

把两个含有45°角的直角三角板如图放置，点D在AC上，连接AE、BD，试判断AE与BD的关系，并说明理由．

阅读下面的材料，按要求作文。

    珍品是珍贵的物品，一般指极其宝贵之物。长城、曾侯乙编钟是承载了中华文明的珍品，圆明园、卢沟桥则是记载民族屈辱史的珍品。有人把古玩古董视为珍品，有人把世界顶级品牌奢侈品视为珍品，有人把山珍海味视为珍品，也有人敝帚自珍，还有人谈起往事如数家珍……

    请以“珍品”为题，写一篇不少于800字的文章。要求：明确立意，自定文体（诗歌除外）；不要套作，不得抄袭。