practical activity是什么意思?

practical activity是什么意思? practical practical A PRACTICAL LOOK AT ACTIVITY-BASED COSTING 求这句话的中文翻译, activity activity ACTIVITY activity book 复数是神马? 如何识别android 中activity A和activity B,系统是如何标识每一个activity . Business Activity Management是一种什么职位? practical是什么意思? Practical Teaching practical是什么意思 android 多个activity怎么知道打开程序时首先是显示哪个activity呢 here are the student activity survey student activity survey为何不加是S 参加这次活动是join the activity还是join in this activity ? activity是什么意思activity book 英语翻译Nanomaterials display novel properties to which most toxicologists have not consciously been exposed before the advent of their practical use.The same properties,small size and particular shape,large surface area and surface activity,whic