简介：Thetemperatureofthesunisover5,000degreesFahrenheitatthesurface,butitrisestoperhapsmorethan16milliondegreesatthecenter.Thesunissomuchhotterthantheearththatmattercanexistonlyasagas,exceptatthecore,thatis,thecenter.thepressuresaresogreatagainstthegasesthat,
阅读理解快速训练
