题型:填空题 如图是通过降压变压器把合适的电压送给用户的交流电路,R0为输电线的电阻,n1为原线圈的匝数,n2为副线圈的匝数,则( )A.n1<n2B.n1>n2C.变压器的输出电压等于交流电压表的示数D.变压器的输出电压等于R0两端的电压 查看答案
题型:填空题 Do you remember _____ last time?[ ]A. what is your teacher saying B. what your teacher saidC. what did your teacher say D. what your teacher says 查看答案