①向人大代表反映情况
②给市政府打电话反映意见
③向新闻媒体反映情况
④参与学生会选举
A:①②③
B:①②④
C:①③④
D:②③④
(1)81+-273+-232
(2)(﹣3)2﹣|1﹣3|+22﹣53
(3)求x值:(3x+1)2=16
(4)(x﹣2)3﹣1=﹣28.
—The scarves are all beautiful.I can't decide which one to choose.—Oh,look at this red one.I think it's______.