使用什么工具在打散后的位图上单击，可快速擦除所有分离的位图图像（）
A、橡皮擦
B、墨水瓶
C、水龙头
D、颜料桶
参考答案：C
In this victory speech ________ before a huge crowd of his supporters, Obama declared that “Change has come to America”.
A．delivered
B．to be delivered
C．having delivered
D．delivering
请回答命门的主治，叙述并演示神门、命门的定位及神门的操作。
