A、<span style="color: rgb(34, 34, 34); font-family: 宋体; font-size: 19px; line-height: 21px; background-color: rgb(255, 255, 255);">不显示本层图形</span>
B、<span style="color: rgb(34, 34, 34); font-family: 宋体; font-size: 19px; line-height: 21px; background-color: rgb(255, 255, 255);">不可修改本层图形</span>
C、<span style="color: rgb(34, 34, 34); font-family: 宋体; font-size: 19px; line-height: 21px; background-color: rgb(255, 255, 255);">不能增画新的图形</span>
D、<span style="color: rgb(34, 34, 34); font-family: 宋体; font-size: 19px; line-height: 21px; background-color: rgb(255, 255, 255);">以上全不能</span>