“百家争鸣”局面的形成与下列诸因素有关系的是（）。 ①封建经济的迅速发展 ②私学的兴盛 ③各国纷争的社会环境 ④社会的剧烈变革
A. ①②
B. ③④
C. ②③④
D. ①②③④
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被称为“图形艺术”的国家是（）
A. 瑞士
B. 瑞典
C. 法国
D. 比利时
Company has a Catalyst 6500 and you need to configure redundancy between the supervisormodules. With route processor redundancy （RPR+）， the redundant supervisor engine is fullyinitialized and configured， which shortens the switchover time if the active supervisor engine fails.Which three statements are true about the RPR + operations when the redundant supervisorengine switched over the failed primary supervisor engine？（）
A. Static IP routes are maintained across a switchover because they are configured from entries inthe configuration file
B. Information about dynamic routing states， maintained on the active supervisor engine， issynchronized to the redundant supervisor engine and is transferred during the switchover
C. Information about dynamic routing states， maintained on the active supervisor engine， is notsynchronized to the redundant supervisor engine and is lost on switchover
D. The Forwarding Information Base （FIB） tables are cleared on a switchover. As a result， routedtraffic is interrupted until route tables reconverge
E. Static IP routes are cleared across a switchover and recreated from entries in the configurationfile on the redundant supervisor engine
F. The Forwarding Information Base （FIB） tables are maintained during the switchover. As aresult， routed traffic continues without any interruption when the failover occur
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