羌活、防风均有的功效是() ["发散风寒,宣通鼻窍","发散风寒、胜湿止痛","发散风寒,助阳化气","发汗解表、利水消肿","发散风寒,行气宽中"]
公路抗震设计时,下述说法中不正确的是()。 ["地基土抗震容许承载力需在深宽修正后的地基容许承载力基础上再修正","地基土抗震容许承载力不宜高于深宽修正后的地基容许承载力","桩基础的抗震允许承载力提高系数可取1.5","抗震容许承载力提高系数取值应依据地基土的类型不同而不同"]
叠加原理只适用于分析下列选项中()的电压、电流问题。 ["无源电路","线性电路","非线性电路","不含电感、电容元件的电路"]
功能疏散风热,解毒透疹,消肿利咽的药物是() ["薄荷","牛蒡子","蝉蜕","荆芥","浮萍"]
功能疏散风热,明目透疹,息风止痉的药物是() ["薄荷","牛蒡子","蝉蜕","荆芥","浮萍"]
变压器调压有哪几种?