Data received from two spacecraft indicate that there is many evidence that huge thunderstorms are now occurring around the equator of the planet Saturn.
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Ensuring an adequate water supply have been a concern ever since people began to live in towns and cities.
移动学习的目标就是希望学习者能在任何时间、任何地点。以任何方式学习感兴趣知识()
在线实时信息交互的移动字习模式主要是实现学生与教师之间的互动学习,学生与学生之间的交互协作学习()
移动学习是由于人们地理空间流动性和弹性习需求的增加而使用移动终端设备进行学习的一种新型学习方式。()