【正】Objective To evaluate the feasibility and safety of the self developed sound outside the ventilation device-esophageal nasopharynx catheter in brain funct
Landscape in colleges and universities is mainly composed of plant landscape.Plant space landscape has a profound impact on the campus landscape construction.Th
The basic principle of Fenlong technology is to make full use of the cultivated layer and the below soil resources and natural precipitation. It can increase th