-It's important for us to know _________ all the subjects. -Yeah, group work is my favorite.
A:how to study
B:when to study
C:which to study
D:what to study
若单项式13a3bn+1和2a2m﹣1b3是同类项,求3m+n的值.
填空
热心的____ A、场面
热闹的____ B、观众
热情的____ C、讨论
热烈的____ D、接待