绕线式异动电动机的转子绕组串入频敏电阻得当时,能使其在有限的起动电流下,获得足够大的起动转矩,使拖动系统易于起动。
参考答案:对
In 1778, banks was elected ______ president of the Royal Society, ______ position he held for 42 years.
A.the; the
B.a; a
C.不填; a
D.不填;the
救援起重气垫由快速接口、供气源、减压器、连接管、控制阀、充气软管、起重气垫等部分组成。