单项选择题
A.Ctrl+CB.Ctrl+ZC.Ctrl+Shift+CD.Ctrl+9
A.A3:12×9B.A3:297×410C.A4:210×297D.A3:420×297
A.220,20B.220,90C.20,50D.100,85
A.1B.2C.3D.4
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