While discussing Krashen’s input theory, it is very easy to find that the problems appear in English teaching are relat......

文中采用模块化设计，从系统硬件电路与软件设计等方面详细阐述了一种基于PCI接口及LVDS的高速数据传输系统设计流程；该系统采用PCI90......

The minerogenetic(or metallogenetic) series of mineral deposits(called minerogenetic series for short) is an academic id......