canvas中规定了2D context，不支持3D context (WebGL)。
举一反三
- canvas中规定了2D context，不支持3D context (WebGL)。 A: 正确 B: 错误
- 如何获取Canvas的2d绘图环境对象Context？请用自然语言阐述（不要拷贝代码）
- JS 文件通过哪个命令获取canvas对象？ A: getWebGLContext(canvas) B: document.getElementById("example") C: canvas.getContext(2d) D: ＜canvas id="webgl" width="400" height="400"＞＜/canvas＞
- Context in SFL refers to . A: Context of language B: Context of culture C: Context of society D: Context of situation
- According to Numan, context can be classified into . A: linguistic context and co-text. B: nonlinguistic context and extra-linguistic context. C: situational context and cultural context D: linguistic context and nonlinguistic context.