如何对青金岩进行质量评价？
参考答案：颜色：紫蓝色（均匀为佳）、净度、块度等方面.
______ in a white uniform, he looks more like a cook than a doctor.
A．Dressed
B．To dress
C．Dressing
D．Having dressed
农产品行业协会有哪些主要特点？
