１、当物距大于２倍焦距时，则像距在１倍焦距和２倍焦距之间，成倒立、缩小的实像。此时像距小于物距，像比物小，物像异侧。
凸透镜和凸面镜相信不少人都了解吧，透镜和面镜为日常生活带来了很多便利，从而也有很多仪器利开发者_开发知识库用这两方面，但是两者之间又有什么样的区别呢?这一个问题困扰着不少人，下面一起看一下凸透镜和凸面镜
i want to write a function that prints multi-dimensional objects which are text (or integers, etc.) into <span></span> tags and arrays into unordered lists.
I\'ve got 开发者_StackOverflow社区an ItemsControl filled with dozens of items; each item is a bound text box and a couple of buttons.Because I want the user to be able to tab from text box to text box
加载中,请稍侯......