In 2018,international oil prices fluctuated in a wide range,along with the recovery of the oil and gas industry.The China oil and gas resources exploration and
1.Objective The study area is located at the southern Zhangguangcai range,which is thought to be the eastern part of the Central Asian Orogenic Belt(CAOB).The s
The outbreak of COVID-19 during the Spring Festival in 2020 caught the whole China and its people off guard.Stay-at-home,quarantine and examination,people’s li