A:when would the train arrive
B:where could I get the book
C:what has been done
D:who left the message
侮辱____(wǔ huí) 击缶____(fǒu guài) 削弱____(xuē xiāo)
战袍____(páo báo) 乘机____(chéng shèng ) 示弱____(ruò rào)
如图所示为一理想变压器,副线圈上接了一个标有“220V,44W”字样的灯泡正常发光,原线圈中的电压表示数为1100V.求: