单项选择题
A.GET_RELATION_PROPERTY B.SET_RELATION_PROPERTY C.GET_BLOCK_PROPERTY D.GET_FORM_PROPERTY
A.POPULATE_LIST B.POPULATE_GROUP C.POPULATE_LIST_ITEM D.POPULATE_LIST_FROM_GROUP E.POPULATE_LIST_ITEM_FROM_GROUP
A.One content canvas and multiple stacked canvases. B.One content and one stacked canvas. C.Tab canvas with several tab pages. D.One content canvas. E.A horizontal and vertical toolbar.