【单选题】When I turn off my computer I have to go back to reality. ( turn off )
【多选题】在变量抽样中需要提高抽样规模的情形包括()
【多选题】在变量抽样中需要提高抽样规模的情形包括( )
【单选题】When I turn off my computer I have to go back to reality. ( turn off )
【单选题】When I turn off my computer I have to go back to reality.(turn off)
【判断题】纯电感正弦交流电路中电流与电压的最大值及有效值之间符合欧姆定律。()