直流电动机不允许直接启动的原因是其启动力矩非常小,并且启动电流又很大。()
参考答案:错
_____ to try his fortune abroad, he left for America.
A.Having determined
B.Being determined
C.Determined
D.To determine
桩的平面布置如图所示,柱截面尺寸为600mm×400mm,则柱边弯矩值MⅠ、MⅡ分别为()。
A.2267kN·m,1600kN·m
B.2358kN·m,1500kN·m
C.2267kN·m,1500kN·m
D.2358kN·m,1600kN·m