展开全部[1]弗化奇a p.牛顿力学.北京:人民教育出版社,1982 [2]王龙甫.弹性理论.北京:科学出版社,1979 [3]da vinci l.testing the strength of iron wiresof variouslengths(notebook,ca.1500).in:parsonswb.engineersand engineering in rena**sance.baltimore:williams and wilkins,... 20210311
题目:analys** on the status of farmers, agriculture and countryside, and development strategies and measures in ** autonomous region 作者:zhong xianghao 1 , li xiangmei 1 and peng chuanzhong 1期刊 journal o...