简述学习资源的形态。
市场通过()实现各种资源的最佳组合和利益最大化。 ["市场垄断","企业计划","市场竞争","宏观调控"]
对于成本计算的分批法,下列说法正确的有()。 ["不存在完工产品与在产品之间费用分配问题","成本计算期与会计报告期一致","适用于小批、单件、管理上不要求分步骤计算成本的多步骤生产","以上说法均正确"]
论述邻里的社会功能。
Part of the routing table of router R1 is displayed below: S 62.99.153.0/24 [1/0] via 209.177.64.130 172.209.12.0/32 is subnetted, 1 subnets D EX 172.209.1 [170/2590720] via 209.179.2.114, 06:47:28, Serial0/0/0.1239 62.113.17.0/24 is variably subnetted, 2 subnets, 2 masks D EX 99.3.215.0/24 [170/27316] via 209.180.96.45, 09:52:10, FastEthernet11/0/0 [170/27316] via 209.180.96.44, 09:52:10, FastEthernet11/0/0 25.248.17.0/24 [90/1512111] via 209.179.66.25, 10:33:13, Serial0/0/0.1400001 [90/1512111] via 209.179.66.41, 10:33:13, Serial0/0/0.1402001 62.113.1.0/24 is variably subnetted, 12 subnets, 2 masks D 62.113.1.227/32 [90/2611727] via 209.180.96.45, 10:33:13, FastEthernet1/0/0 [90/2611727] via 209.180.96.44, 10:33:13, FastEthernet1/0/0 S* 0.0.0.0/0 [1/0] via 209.180.96.14 From analyzing the above command output, what is the administrative distance of the externalEIGRP routes?() ["24","32","90","170","27316","None of the other alternatives apply"]
什么是抗原漂移,什么是抗原转换?