To increase the reach of HBS On-line, we not demand an application for our certificate programs. (Apps are still expected for our credential applications: CORe and CLIMB.) You can now immediately enroll and start using the next action in the vocation. 上面是取色环。外面的圈，拖动可以改变色相，中间的方框可以改变明度和饱和度。 Our easy on-line enrollment variety is totally free, https://shahrukhk913ggh4.idblogmaker.com/profile