该物质的分子式为____，结构简式为____．

如图所示，用硬纸片把收音机的一个喇叭糊起来，做成一个“舞台”，当你打开收音机时台上一个小人在音乐声中翩翩起舞．关于这个现象，下列说法中不正确的是（　　）

材料一  一位老师走进了教室，他先拿出了一张画有个黑点的白纸，问他的学生：“孩子们，你们看到了伊兹?”学生们盯住黑点，齐声喊道：“一个黑点。”老师非常沮丧：“难道你们谁也没有看到这张白纸吗?眼光集中在黑点上，黑点会越来越大。生活中你们可不要这样啊!”

 材料二 日本有一位著名女尼，俗名大石顺教，年轻时外貌欠佳，且不幸双臂被截，心灰意冷，遁入尼庵，削发为尼。她在研读佛经中受到启示，觉得自己应该坚强起来，于是练习绘画，没有双臂，她就用嘴含着笔作画，经年不辍。到了晚年，她终于不负苦心，成了一名闻名世界的禅尼画家，她的作品被世界许多知名的图书馆、博物馆所珍藏。

    When I was five years old. I took a boat out on the river and went fishing by myself. I really wanted to catch a fish! But they were not biting.

    I stayed in my boat for three days, waiting. A few times, I thought I felt a fish at the end of the line. The first time I pulled in my catch, it was not a fish; it was an old bag. The second time, it was a shoe. Finally, at the end of the third day, I felt a strong pull at the end of the line. The pull was so strong they my boat raced around and around. I needed all my power just to hold onto the fishing rod. I pulled, and I pulled and I caught the biggest fish that ever swam on the Earth! It was heavier than everyone in this room put together! Then something terrible happened!

    After I pulled the huge fish into my boat, I saw that the boat was going under water! Water was coming into the boat from all sides! I was not a very good swimmer, so I was scared.

    Although it was the hardest choice I ever made. I had to let the fish go. I pushed it back over the side of the boat, and we waved good-bye to each other as it swam away.