In which Cisco IOS configuration mode is the route distinguisher （RD） configured？（）
A. R1（config-route-at）#
B. R1（config-route-map）#
C. R1（config-it）#
D. R1（config-vrf）#
E. R1（config）#
F. R1（router）#
查看答案
Chain suspension ladders on a ship must be replaced by fixed ladders if the required chain suspension ladder（）.
A. has been sent in for repair
B. cannot be supported against a vertical flat surface
C. does not extend to the water when the ship lists 15 degrees
D. is not equipped with vertical guard rails on either side
机动车转向轮的胎冠花纹深度应大于等于（）；其余轮胎胎冠花纹深度应大于等于1.6mm。
A. 2.8mm
B. 3.0mm
C. 3.2mm
D. 3.4mm
多台计算机联合使用并构成高性能的计算机体系协同工作，并行处理的方式，要比单独购置高性能的大型计算机便宜得多。
A. 正确
B. 错误
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