1.什么是HTML?(Hyper Text Markup Language:超文本标记语言)超文本:功能比普通文本更加强大标记语言:使用一组标签对内容进行描述的一门语言(它不是编程语言)2.语法和规范?HTML文件都是以.html或者.htm结尾的,建议使用…
https://www.ted.com/talks/katie_bouman_what_does_a_black_hole_look_like/transcript 00:13In the movie "Interstellar[ˌɪntərˈstelə(r)]星际的," we get an up-close look at a supermassive black hole. Set against a backdrop of bright gas, the black…