RIP and OSPF are configured on the routers as shown in the exhibit. R2 is configured with a two-way redistribution between RIP and OSPF domains. All routers can ping each other， but R1cannot see any of the OSPF routes in its routing table. What could the problem be？（） OSPF and RIP use the same major network 172.16.0.0. Therefore， the keywordsubnets is notrequired to redistribute protocols into OSPF。 Because OSPF has a longer mask for the same major network than RIP and because RIPversion 1 is being used， none of the routes learned from OSPF will be advertised into RIP。 The metric for the OSPF routes that are redistributed into RIP is too low， a fact that preventsOSPF routes from being advertised into RIP。 The process of redistribution of RIP into OSPF does not require any metric conversion， so thereis no need to define the metric using the default-metric command during the redistributio。
辨伪通常采用哪些方法？
关于妊娠期合并急性乙型肝炎患者的特点， 错误的是：（） 无黄疸型肝炎比例高。 消化道症状较明显。 产后大出血较常见。 可对胎儿有影响。 妊娠后期患乙型肝炎者易传播给胎儿。
What is the purpose of configuring router R1 with the "IP Helper address" command？（） IP Helper is used to direct BOOTP clients to a BOOTP server。 IP Helper is used to prevent the router form forwarding IP broadcasts。 IP Helper is used to allow IPX clients to communicate with IP-based servers。 IP Helper is used to accommodate compatibility routers using different IP routing protocols。 None of the other alternatives apply。
下面不属于压力控制阀的是（） 节流阀。 调速阀。 换向阀。 溢流阀。
小说的故事情节是按照（）组织起来的一系列事件。
