Question

假如你是李丽,学校要组织志愿者"献爱心"话动,给团总支写一封自荐信英语作文

Answer 1

fact that, he pointed out that the stellar collapse under their own gravity is trapped in a region, the surface is finally reduced to zero. And because the surface of this region is shrunk to zero, its volume should also be. Everything in the star will be compressed into a zero volume region, so the density and space of matter - the curvature of time becomes infinite. In other words, people get a singularity, which is contained in a region of space called black holes..