双翼井田
参考答案:
是指井筒布置在井田走向中央的井田。
—I remember thar you used to play ______guitar well . —Yes,but now I often play ____football
A. the;the B./;the C. the;/
交流电流通过导体时会产生趋肤效应,其结果使导体的电阻减小。()