JZ-7型空气制动机分配阀的紧急限压阀,紧急制动时直接限制()压力不超过450kpA。
A. 制动缸
B. 作用风缸
C. 降压风缸
D. 紧急风缸
对路由器A配置RIP协议,并在接口S0(IP地址为10.0.0.1/24)所在网段使能RIP路由协议,在系统视图下使用的第一条命令是()。
A. Rip
B. rip10.0.0.0
C. network10.0.0.1
D. network10.0.0.0
What is the wavelength, if the frequency is 6MHz?
A. 180m
B. 18m
C. 50m
D. 500m
A ship operating in sea area A1 must have the following provisions of maintenance:
A. Shore maintenance
B. Duplication of equipment
C. At Sea Maintenance
D. Any one of these