單項(xiàng)選擇題

執(zhí)行蒙板操作的對(duì)象是:()

A.所選對(duì)象中處于上層對(duì)象
C.最上層的對(duì)象
B.所選對(duì)象中處于下層對(duì)象
D.最下層的對(duì)象

微信掃碼免費(fèi)搜題