平方律光纤的归一化截止频率为()。 ["2.405","3.04","3.518","3.83"]
随机接入的目的是() ["初始接入","建立上行同步","小区搜索","寻呼"]
标准贯入实验中钻杆长度大于()时,应对锤击数进行修正。 ["3m","6m","9m"]
当归一化频率2.405<V<3.83时,则光纤中传导模至多有()。 ["HE11模和HE21模","TM01模和TE01模","LP01模和LP02模","HE11模和LP11模"]
下列那个不是“一窗式”管理的窗口模式。() ["两窗三人","两窗四人","一窗二人","一窗一人"]
控制NOx的措施有那些?