【Abstract】English language has undergone a long-term development and now it has become an international language.The w......

目的分析全髋关节置换术(THA)与半髋关节置换术(HA)治疗老年移位型股骨颈骨折的远期效果及对患者髋关节功能的影响。方法抽取2017......

Introduction　　Airbnb， as one of the best-known sharing economy businesses all over the world， is a company based in San ......