剩余电流动作保护器对被保护范围内（）间引起的触电危险，保护器不起保护作用。
A. 相--相
B. 相--零
C. 相--地
D. 地--零
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消弧线圈中性点隔离开关，不能正常操作，开展（）类检修，检修中性点隔离开关。
A
B
C
D
重力加载就是将物体本身的重力施加于结构上作为荷载
A. 正确
B. 错误
For a router to successfully redistribute routes between OSPF and EIGRP, which of the following are true?（）
A. The router must have one routing protocol configured, but configuration for both routing protocols is not necessary
B. The router must hav e at least one working link connected to each routing domain
C. The redistribute command must be configured under EIGRP to send the routes to OSPF
D. The redistribute command should be configured under OSPF to take routes from EIGRP into OSPF
《济南铁路局安全成绩统计管理办法》规定安全成绩和安全天数从何时起开始计算？
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