题目内容
直径为25.5厘米的地球仪的比例尺约为
A.1:10,000,000
B.1:20,000,000
C.1:40,000,000
D.1:50,000,000
A.1∶10000000
B.1∶20000000
C.1∶40000000
D.1∶50000000