下面几种检验方法中,属于桩基低应变检测的方法有() ["钻芯检验法","反射波法","机诫阻抗法","射线法"]
在RL串联电路中,已知电源电压为U,若R=XL,则电路中的无功功率为() ["A、U2/XL","B、U2/(2XL)","C、U2(2XL)"]
在S1接口传用户数据的话可以使用以下哪个协议() ["S1AP","SCTP","GTP-U","GTP-C"]
EEC同飞机、发动机有大量接口,其输入:(). ["有模拟量,离散量,频率量,数据总线的输入量","全部为数字信号","仅仅开关量","全是序列数据"]
PCRF与PDN网络的AF之间的逻辑接口是() ["Gx","Rx","SGi","S8"]
什么叫电阻率?