下列是生活中的一些摩擦现象：①走路时鞋底与地面之间的摩擦；②汽车行驶时，汽车与空气之间的摩擦；③骑自行车时，车轮与轴之间的摩擦；④皮带传动中，皮带与皮带轮之间的摩擦，其中属于有害摩擦的是（  ）

根据短文内容判断正误。

    Tom has a strong and faithful dog, Bruce. The dog likes playing with Tom. Sometimes he also follows Tom's father to work.
One morning when Tom's father worked in the field, he took off his coat and put it on the ground under a big tree. He turned to the dog and said,“Watch my coat, Bruce!”
   Bruce sat down on the coat. Later Tom's father remembered he had to buy some food. So he hurried to the shop. After shopping, he went home directly and forgot all about his coat and the dog.
   Late in the evening Tom looked for his dog everywhere in the house, but he couldn't find him. At this time Tom's father suddenly remembered his coat and the dog. He went back to the tree at once. He found that Bruce was still sitting on the coat!

一个几何体的展开图如图所示，这个几何体是（　　）

阅读下面的材料，完成后面题目。

材料一：香港实业家邵逸夫遍撒爱心，在全国各地校园捐建逸夫楼；田家炳楼也几乎遍布了全国校园。学校接受企业捐资助学，并附以校园楼馆等冠名权作为对捐资者的感谢，几成惯例。

材料二：在海外，不乏冠名楼宇。美国耶鲁大学赫赫有名的标志性建筑之一——斯特林纪念图书馆，就是以美国慈善家、耶鲁大学重要的捐助人约翰·威廉·斯特林的名字命名的。