Therefore simultaneous adoption of multiple types of learning,especially with overlapping,interaction and integration among them,is the mechanism of and condition for students' all-round development.Study on all-round development needs a new way of thinking that is to discover overlapping,interaction and integration among multiple types of learning rather than to decide which type is more or less important.The latter question only arises when we want to highlight development of particular qualities.For example,if we are concerned about cognitive development,symbolic learning will surely be considered more important than others.However,if we want to emphasize development of operative skills,operative learning will be most effective and others being only supplementary.