下列属于违纪行为的有（）。
A、带手机上岗
B、上班回宿舍
C、上网
D、睡觉
参考答案：A, B, C, D
Barrack Obama’s recent visit to the Asian nations clearly sent a message to the world _____ Asia is important in America’s global partnership.
A．which
B．where
C．that
D．what
