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【单选题】
双十字轴万向节实现等速传动的条件是:①第一万向节两轴间的夹角与第二万向节两轴间的夹角相等;②()。
A.
第一万向节从动叉的平面与第二万向节主动叉的平面处于同一平面内。
B.
第一万向节从动叉的平面与汽车纵向平面处于同一平面内。
C.
第一万向节主动叉的平面与第二万向节主动叉的平面处于同一平面内。
D.
第一万向节主动叉的平面与汽车纵向平面处于同一平面内。
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