简述组播地址范围。
服务礼仪主要是以服务人员的仪表规范、（）、语言规范和岗位规范为其基本内容的。 站姿规范。 坐姿规范。 走姿规范。 仪态规范。
《学生体质健康标准》的评价指标规定，大学各年级的评价指标有5项：身高标准体重、肺活量体重指数为必评指标；某大学女生还可选择（）作为选评指标。 800米跑、仰卧起坐、立定跳远。 800米跑、台阶试验、立定跳远。 800米跑、仰卧起坐、50米跑。 800米跑、引体向上、坐位体前屈。
简述设计类型的划分及其原理
Before inserting a new switch in the network，the network administrator checks that the VTP domain name is correct，the VTP mode is set to server， and revision is lower than the switches in the network. The administrator then configures interfaces and trunks，erases existing VLANs，and connects the switch to the network. Following that procedure，there is no connectivity in the network. What is a possible cause of this problem？（） Because the configuration revision of the new switches is lower than the rest of the network， it can change the VLAN database of the other switches.。 As a VTP server， the new switch deleted all VLANs of the network.。 Erasing VLANs increases the VTP configuration revision.。 Since the configuration revision of the network is higher than the new switch， the VLAN database was automatically synchronized.。
黎巴嫩的作品《相会》被认为是？（）
