【单选题】If the cluster size N of a cellular system is 7 and the path loss exponent n is 4, assume that there are six co-channel cells in the first tier, determine the signal-to-interference ratio______.
【单选题】If the cluster size N of a cellular system is 12 determine the co-channel ratio______.
【简答题】For a cellular system, if the cluster size is 7 and the distance between two adjacent cells is 1 km, then the distance between two nearst co-channel cells is________km.
【多选题】对于甲氧苄啶,正确的是( )。
E.
常与SMZ或SD合用,治疗泌尿道、呼吸道、肠道感染,脑膜炎,败血症等
【单选题】下列关于磺胺类抗菌药说法错误的是()。
A.
呋塞米,噻嗪类利尿剂过敏患者不宜使用磺胺类抗菌药
B.
长期大量使用磺胺甲噁唑时宜多饮水,可与碳酸氢钠同服
C.
磺胺类药物可致肾损害,用药期间应监测肾功能。
D.
磺胺类药物一般不会引起肝损害,肝功受损患者无需调整剂量
【多选题】临产期使用可引起红细胞缺乏葡萄糖-6-磷酸脱氢酶者溶血的药物 ()