当前位置：在线题库搜索＞[多选题]下面是使用椭圆选框工具创建选区时常用到的功能，请问哪些是正确的？（）的答案是什么？
问题：
[多选题]下面是使用椭圆选框工具创建选区时常用到的功能，请问哪些是正确的？（）
A、 按住Option（Mac）/Alt（Win）键的同时拖拉鼠标可得到正圆形的选区
B、 按住Shift键的同时拖拉鼠标可得到正圆形的选区
C、 按住Option（Mac）/Alt（Win）键可形成以鼠标的落点为中心的椭圆形选区
D、 按住Shift键使选择区域以鼠标的落点为中心向四周扩散
参考答案：
B| C
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