Age 3 + ) all the cubes are connectable and can rotate to create different models . develop logical thinking , motor skills , patterning and creativity . can be used with the eva cube board 适合三岁或以上)立方体的五面均可连接其他立方体,又可转动方向,小朋友甚至可创造较高层次的几何模型,有助学习数目、分类、次序和图案设计。可配合软垫玩耍。
Secondly , it detailedly recommends the technical principle of ole / com which is the basic technique of opc standard and emphatically discusses some characters of com technique , such as language irrelativity , reusability and so on , and the communication of com technique , included connectable object mechanism , the udt ( uniform data transfer ) mechanism and dcom technique 接着对opc标准的基础技术ole com技术原理作了较为详细的介绍,重点论述了com技术的语言无关性、可重用性等特性和com技术的通信机制? ?可连接点机制、数据通报机制和dcom技术。