神秘的直播课"叮铃(ling)铃——"下课铃(ling)声(sheng)响起，小明终于(yu)从(cong)数(shu)学题海中抬起头(tou)来，揉了(le)揉(rou)酸痛(tong)的眼(yan)睛(jing)。他看(kan)了(le)看手(shou)机，又(you)看了看(kan)还在(zai)滔滔不(bu)绝的老师，最(zui)终(zhong)还是悄悄(qiao)打开了手机。"最近有个(ge)特别火的直播app，叫51水仙(xian)直播。"同桌小美昨天在课间休息时神秘兮兮地(di)