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【多选题】
运算的计算方法与应用图像命令极为相似,但是有哪些地方不同?A.
应用图象命令可以使用图象的复合通道做运算，而运算命令只能使用图象的单一通道
B.
应用图象命令的资源只有一个，而运算命令可以有三个资源文件
C.
应用图象的运算结果会被加到图象的图层上，而运算命令的结果将存储为一个新的通道或建立一个全新的文件
D.
应用图象命令需要有相同大小及色彩模式的图象才能进行运算，而运算命令不需要这些条件
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