爆震
Which three of these statements about Dynamic Trunking Protocol are correct？（） [" It supports autonegotiation for both ISL and IEEE 802.1Q trunks."," It must be disabled on an interface if you do not want the interface to work as a trunk or start negotiation to become a trunk."," It is a point-to-multipoint protocol."," It is a point-to-point protocol."," It is not supported on private VLAN ports or tunneling ports."]
票据变造
（跳远的）腾起角
《动车组列车服务质量规范》商务座、特等座、一等座车厢不存放清洁工具。清扫工具、清洁剂材质符合规定。
体育课程实施的现实性
