高级材质类型有下列哪些（）
A、混合材质
B、双面材质
C、光线追踪材质
D、多维子对象
参考答案：A, B, C, D
________ was that the building there stayed up in the heavy earthquake. [ ]
A. To our surprise
B. We are surprised
C. What it was surprised
D. What surprised us
PROLOG语言属于 (3) 程序设计范型，该范型将程序设计归结为列举事实，定义逻辑关系等。
A．过程式
B．函数式
C．面向逻辑
D．面向对象
