Chroma is that aspect ofcolor that indicates()
A. degree oftranslucency
B. degree ofsaturation ofthe hue
C. combined effect ofhue and value
D. all ofthe above
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测量橡胶材料的硬度，通常用哪个硬度来表征()
A. 布氏硬度(Brinell hardness)
B. 洛氏硬度(Rockwell hardness)
C. 邵氏A(Shore A)硬度
D. 努氏硬度(Knoop hardness)
按照硅氧四面体连接的方式，将硅酸盐晶体结构分为五种：_________、________、_______、_______和______。
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