下面的（）颜色是纯正的蓝色。
A、品红60％青60％
B、品红60％青80％
C、品红80％青60％
D、品红60％青50％
参考答案：B
As soon as the exams were over, the students all went their （） ways.
A. homely
B. perspective
C. respective
D. diverted
光源的发光多少具体如何测量？
