A.对
B.错
[单选题]A.成对室性期前收缩B.室性期前收缩二联律C.室上性心动过速D.室性期前收缩三联律E.房室传导阻滞
[单选题]A.stay outside the network of social influenceB.have little contact with th
[单选题]A.a′=aB.a′>aC.a′<aD.不能确定
[单选题]A.a′=aB.a′>aC.a′<aD.不能确定
[单选题]A.stay outside the network of social influenceB.have little contact with th
[单选题]A.stay outside the network of social influenceB.have little contact with th