Presently， the issue of completing a systematic volunteerism has drawn an increasing amount of attention from governments......

【Abstract】Up-star learning master APP is a professional mobile online teaching platform for mobile terminals， which has......

Ⅰ.Introduction　　Ramsey’s theorem is a foundational result in combinatorics. The first version of this result was pro......

【Abstract】With our country’s quick urbanization and modernization， the development of Pu’er’s rural tourism in Yunna......

In the first half of this year,CNPC further promoted the source opening,cost reduction,and efficiency increasing of the ......

Pancreatic adenocarcinoma is the fifth leading cause of cancerrelated deaths worldwide,and this incidence is projected t......

Affected by the pandemic situation,the orders of textile companies in the domestic and foreign markets decreased signifi......