OpenGL包含有哪几个缓冲区（）
A.颜色缓冲区
B.深度缓冲区
C.模板缓冲区
D.积累缓冲区
参考答案：A, B, C, D
The professor could tell by the ________ look in Maria's eyes that she didn't understand a single
word of his lecture. [ ]
A. cold
B. blank
C. innocent
D. fresh
中国公民王某的月工资600元，年末一次性取得奖金4200元，王某全年应缴个人所得税为( )。
A．90元
B．475元
C．505元
D．840元
