单项选择题
A.黑、蓝、绿、棕 B.黑、红、绿、棕 C.红、蓝、紫、黑 D.黑、蓝、紫、棕
A.1:5000 B.1:25000 C.1:100000 D.1:500000
A.25 B.50 C.100 D.125