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Which two are characteristics of RSVP? () [" RSVP itself provides bandwidth and delay guarantees."," For RSVP to be end-to-end, all devices must support RSVP."," RSVP reservations are maintained by a centralized reservations server."," An RSVP compatible QoS mechanism must be used to implement guarantees according to RSVP reservations."]
什么是变压器的铜损、铁损?
学生的主体性集中体现为他们的独立性、主动性和创造性。发挥和培养学生的主体性是实现全面发展教育目标的必由之路。()
某种债券的面值为100元,购买该债券的市场价格为98元,债券的年利主率为5%,则其直接收益率为多少?
下列哪一项不是青少年逆反的影响因素() ["青少年的特质","父母的自我状况","父母榜样作用削弱","父母与孩子间的沟通和理解状况"]
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