I've become good friends with several of the students in my school _______ I met in the English speech competition last year.
A:who
B:where
C:when
D:which
下列语句描述中,描述气候的是( )
图中甲同学是流感患者,以下叙述错误的是( )
定义运算※为a※b=a+bb-a,且3※m=2,那么m的值是 ( )