单项选择题
A.HIDE_WINDOW
B.CLOSE_WINDOW
C.REPLACE_CONTENT_VIEW
D.GET_WINDOW_PROPERTY
单项选择题 Whichcanvasbuilt-indisplaythegivencanvasinfrontofanystackedcanvases?（）
单项选择题 YouneedtobaseadatablockontheEMPtable,butyoudonotwanttogivetheusersoftheapplicationaccessprivilegesonthetable.Whichtypeofdatasourcewouldyouusetocreatethedatablock?（）
单项选择题 Youneedtodisplayaverylargesingle-recorddatablock.Sinceitwillbesolarge,aconvenientmeansofnavigationisneededbetweenitems.Whichtypeofcanvaswouldyouusetodisplaythedatablock?（）