题目内容

平面运动副，其自由度加约束数等于3。

A. 对
B. 错

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A. 对
B. 错

A. 对
B. 错

A. September 9 of the lunar calendar.
B. August 15 of the lunar calendar.
C. May 5 of the lunar calendar.
D. January 15 of the lunar calendar.

A. Nine Nine Festival.
B. Two Nine Festival.
C. Two Ninth Day.
Double Ninth Day.