牵引电动机输出的功率和（），必须传递到机车的（）上，才能发挥其牵引作用。
参考答案：转矩；轮轴
Li Ming ______ get up late when he was a child, but now he ______ getting up early. [ ]
A. got used to, used to
B. used to, gets used to
C. used to, used to
D. gets used to, used to
TIG焊有哪些缺点？
