问题
单项选择题
When visibility is reduced to about 5 miles, we say that visibility is（）.
A.very good
B.good
C.poor
D.moderate
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
When visibility is reduced to about 5 miles, we say that visibility is（）.
A.very good
B.good
C.poor
D.moderate
参考答案：D