问题
单项选择题
The range of a MF coast station is normally（）nm.
A.20 to 30
B.200
C.100
D.450
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
The range of a MF coast station is normally（）nm.
A.20 to 30
B.200
C.100
D.450
参考答案：D