【多选题】以下选项中哪些属于常见的QoS 服务模型()
【单选题】-----Robert has made up his mind to work even hard. ------_______, and so have other boys , who always play football withRobert .
【单选题】Hurry up! Flight 4406 off at 18:40.
【单选题】He has recently ____ tennis to relax himself in his spare time. [ ]
【单选题】三种主要食物在胃中的排空速度由快到慢的顺序是 ( )。
【单选题】He has recently ________ golf to provide himself with some relaxation. [ ]
【多选题】以下哪些属于科研项目承担单位与被吸纳高校毕业生签订的服务协议内容?
【单选题】I am deeply sorry that it has taken so long to () this problem.
A.
straighten up:straighten over