The network administrator is trying to add Switch1 to the network， but the 802.1Q trunk is not coming up. Switch1 was previously tested in the laboratory and its trunk configuration worked fine. What are three possible causes of this problem？（） The trunking configuration mode on Switch1 is set to Off.。 The trunking configuration mode on the other end is set to On.。 The trunking configuration mode on the other end is set to Desirable.。 Cisco Discovery Protocol is not running on the other end.。 There is a VTP domain name mismatch.。 Switch1 does not support 802.1Q.。
旋流器是利用离心力分选末煤的设备，旋流器工作时，其轴心必须形成空气柱，底流必需以辐射（）排出。 伞状。 柱状。 无规则形状。
少先队中队活动有规定的仪式和程序，若受场地、天气或时间等限制可省略部分程序，但（）程序不能省略。 整队、报告人数、出旗、唱队歌。 唱队歌、中队长讲话、呼号、活动开始。 出旗、唱队歌、呼号、退旗。 辅导员讲话、呼号、唱队歌、退旗。
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
地道、天桥、站台，列车车梯、门头、通过台有积冰、积雪，属于（）问题。
