在滑差电动机自动调速线路中,三相交流测速发电机可将转速转变为三相交流电压,经三相桥式整流和电容滤波后,由电阻分压得到反馈电压。
参考答案:对
Tommy is ____ only child in the family, so his parents make ____ fuss of him.
A.an, \
B.\ , the
C.\ , a
D.the , a
求所有(0,+∞)上的正连续函数g(x),使得对任意x>0有