HDV是一种缺陷性RNA病毒，是因为（） HDV必须有HBV或其他嗜肝DNA病毒的辅助才能复制，表达抗原及引起肝损害。 HDV必须有HAV的辅助才能复制，表达抗原及引起肝损害。 HDV必须有HEV的辅助才能复制，表达抗原及引起肝损害。 HDV-RNA不能编码病毒结构蛋白质。 HDV-RNA在无HBV的辅助情况下，不能自行复制。
根据《关于取保候审若干问题的规定》，取保候审保证金不能是（）。 人民币。 可兑换的外币。 实物。 权利凭证。
Which two VoIP capabilities are utilized when the CallManager and the gateway are configured for Survivable Remote Site Telephony？（） Analog phones， connected to the PSTN， act as internal call agents if IP communication to the CallManager is lost.。 An onsite gateway reroutes calls over the PSTN if IP communication to the CallManager is lost.。 The IP phones can reroute calls over the PSTN if IP communication to the CallManager is lost.。 Local voice gateways can assume the function of a call agent if IP communication to the CallManager is lost.。 IP phones use an internal call agent if IP communication to the CallManager is lost.。
说明句中的词类活用现象
孟尝君客我。
Which of the following characteristics describe the BPDU Guard feature（） ABPDU Guard port should only be configured on ports with PortFast enabled.。 BPDU Guard and PortFast should not be enabled on the same port.。 BPDU Guard is used to ensure that superior BPDUs are not received on a switch port.。 ABPDU Guard port receiving a BPDU will go into err-disablestate.。 ABPDU Guard port receiving a BPDU will be disabled.。 BPDU Guard can be enabled on any switch port.。
临界比载是指导线在最高气温条件下的弧垂（）覆冰条件下的弧垂的比载。
