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【单选题】
（）是一种标准件，通常用来实现轴与轮毂之间的周向固定，并传递转矩，有的还能实现轴上零件的轴向固定或轴向滑动。
A.
销
B.
键
C.
钉
D.
铆
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】In the last two hundred years there have been great changes in the method of production of goods. This is now also true of the building industry; for mechanization has been introduced. System building...
A.
the latter uses ready-made internal features
B.
panels are cast in a level position
C.
the former is used to build walls and floors while the latter to construct bathrooms or bedrooms
D.
the former is more expensive than the latter