室内光环境的分类为人工采光和自然采光。
参考答案：对
釉熔体的析晶过程要先有晶核，晶体再围核长大。
Ron can type five forms of a test in 4 hours. Joan can type the same five forms in 6 hours. If they work together, how many hours would it take them to type ten forms of a test
