作文天地 
        作文的内容来源于生活，我们应学会从生活中找“米”，只有随时留意我们周围的生活，经常细心观察我们的生活，才会有感而发，抒发我们的真情，最终写出打动人的文章来。请调动你的积累，搜索你的记忆，采写你熟悉的人和事，说真话，抒真情。
        请以“心灵深处的______”为题，写一篇文章。
        要求：①把题目补充完整，可填写“秘密”、“回忆”、“烦恼”、“快乐”、“伤痛”……②说真话，抒真情，不少于500字。③除诗歌外，文体不限。

地球上最大纬线圈的长度为（　　）

一个长方体的三视图如图所示，若其俯视图为正方形，则这个长方体的表面积为（    ）

    I'm crazy about chocolate, so it's no surprise that my favorite book is Charlie and the Chocolate Factory by the wonderful Roald Dahl. Forget Charlie Bucket, the real hero is Willy Wonka, inventor of the most amazing sweets in the world.

    Here are just a few of his delicious creations ：

    Hot ice cream for a cold day! What a great idea. Now I can eat ice cream every day! He also invented an ice cream that never melts (融化）—very useful.

    Wallpaper that you can lick. This wallpaper comes in orange, grape, apple and banana flavours. When you lick the pictures, you taste the fruit. Brilliant!

    Grass made of sugar called Swudge. It grows by the chocolate river and the chocolate waterfall in Willy Wonka's factory.

    Mr. Wonka also invented some special sweets for schoolchildren, such as a kind of chocolate others cannot see when you are eating it. There are also sugar-coated pencils and magic hand-fudge (软糖）—you hold the fudge in your hand and you taste it in your mouth. Finally, there are Wonka's exploding weets — a great way of scaring (恐吓）the school bully!

    Anyway, these are just a few of his inventions. Read the book if you want to know more.

若平面上两定点之间的距离为5cm,一动点到这两定点的距离之和为5cm，则该动点的轨迹为(   )