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【单选题】
设计滚子从动件凸轮廓线时,若廓线出现尖点,可以采取( )措施。
A.
减小基圆半径
B.
加大基圆半径
C.
加大滚子半径
D.
加大凸轮轮轴半径
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参考解析：
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【单选题】I arrived in the United States on February 6, 1866, and I remember my first day here very clearly. My friend was waiting for me when my plane landed at Kennedy Airport at three o’clock in the afternoo...
A.
he only made some gestures
B.
he did not order at all
C.
he could not make himself understood
D.
the waiter was unwilling to serve
【单选题】在凸轮传动机构中，常采用滚子从动件，使从动件的滚子与凸轮轮廓接触。其目的是（）。
A.
使结构简单
B.
减少凸轮表面磨损
C.
提高从动的运动速度
D.
降低从动件的运动速度