作等速运动的凸轮机构从动件在速度变换处将产生()冲击,引起机构强烈地振动。
查看答案
I was glad to learn that my friend Linda stoodin the beauty contest (选美比赛).
She couldn’t help letting that it was her brother who broke the window
Albert Einstein (爱因斯坦) is one of the most scientists of the 20th century
Match the basketball terms with the Chinese equivalents