已知r=1,则一定有
A、a=1
B、b=1
C、[img=~/QImg/2013-10-14-11-12-39/image002.jpg]
D、[img=~/QImg/2013-10-14-11-12-39/image003.jpg]
E、以上都不对
发布时间:2023-07-24 21:00:25
A、a=1
B、b=1
C、[img=~/QImg/2013-10-14-11-12-39/image002.jpg]
D、[img=~/QImg/2013-10-14-11-12-39/image003.jpg]
E、以上都不对