满载调整主要靠调整制动力矩来改变制动力臂和制动磁通。
参考答案：对
They had just taken their seats, then _____
A．the chairman came
B．the chairman comes
C．came the chairman
D．comes the chairman
四君子汤是由人参、白术、甘草加何药组成（）
A.半夏
B.砂仁
C.干姜
D.茯苓
E.陈皮
