单项选择题

In a fog the ______ is very poor,

A. probability
B. flexibility
C. reliability
D. visibility
<上一题 目录 下一题>
热门 试题

单项选择题
Humans should not develop their economy at the（）of the ecological environment.

A. destruction
B. pollution
C. expense
D. mercy
单项选择题
A laser beam is used to （）even the hardest substance.

A. light up
B. repair
C. identify
D. penetrate
相关试题