题目

    It was reported last week that developers could take photos from Apple mobile and Google  Android devices without the phone owners knowing that the images were being taken. In Apple's case, developers can also obtain the location information for each photo.        Senator(参议员) Charles Schumer said in a telephone interview that his office had spoken with officials at both Apple and Google on Monday.        “We asked them if they could find a way on their own to prevent Apple from having access to private information,” Mr. Schumer said.“They were friendl自行车是我们熟悉的交通工具，从自行车的结构和使用来看，在很多方面都涉及到摩擦的知识．请根据你对自行车的认识，举两个自行车在结构和使用方面与摩擦相联系的实例：（1）    ．（2）