下列不是带翼扩弓活动矫治器的组成部分的是（）
A.眉式唇弓
B.箭头卡环
C.平面导板
D.前后扩弓簧
E.翼板
参考答案：C
People who are ______ drugs can’t go without them for a few hours , can they ?
A．addicted to
B．engaged in
C．satisfied with
D．related to
The class _____ disagreed among themselves about their plan for a picnic on Sunday. [ ]
A. are
B. is
C. have
D. has
