体育的中心在于通过身体锻炼增强体质，提高健康水平。
A. 正确
B. 错误
Which two statements about the DiffServ QoS model are true？（）
A. DiffServ requires RSVP to set up a path through the network to accommodate the requested Qo
B. Network traffic is identified by class， and the level of service is chosen for each class.
C. The DiffServ model relies on a fairly simple mechanism to provide QoS over a wide range of equipment.
D. RSVP enables the DiffServ model to provide end-to-end Qo
E. The DiffServ model is more scalable than the IntServ model.
F. The flow-based approach of the DiffServ model is ideal for large scalable implementations such as the public Internet.
痄腮患者自起病至（）时止须进行隔离。流行季节针刺颊车、合谷、可作为（）。
社会主义社会的分配原则是（），在发展生产的基础上提高劳动报酬和福利待遇。
A. 各尽所能，各取所需
B. 各尽所能，按劳分配
C. 能者多劳，多劳多得
D. 劳动光荣，勤劳致富
微信支付 
支付宝支付