关于等效变换说法正确的是()
A、等效变换只保证变换的外电路的各电压、电流不变A
暂无解析
两列机械波I、II在传播过程中遇到一障碍物，I的波长与障碍物尺寸相当，II的波长远小于障碍物尺寸，则机械波（）
localpeoplearequestioningthe________(wise)ofspendingsomuchmoneyonthenewroad
Iwouldratheryou__(come)tomorrow.
Heis______absorbedinhisownthoughtsthatheseemsunawareofwhat'sgoingonintheroom
Hismotherbecomesdisappointedwheneverhefailstoliveuptoher________(expect)
