Monday, December 25, 2023
问题:检验时如发现首饰有()、(),即说明首饰的毛刺、尖角部位没有锉、...
Friday, September 16, 2022
Friday, September 16, 2022
问题:某玫瑰色透明刻面宝石,折射率为1.76、1.77,密度为3.99g/cm³,它应该是:()。A、红宝石B、碧玺C、尖晶石...
Sunday, November 26, 2023
问题:一颗蓝色弧面形戒面,折射率近1.50,局部含细粒黄铁矿颗粒,局部...
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
问题:一颗无色非均质体宝石,折射率为1.544,密度为2.66,它可能...
Friday, September 16, 2022
问题:光从光密介质进入光疏介质必然是折射角()入射角。...
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
问题:下列绿色或蓝绿色宝石中,()在查尔斯滤色镜下可能会变红。...
Friday, September 16, 2022
问题:区分猫眼与石英猫眼戒指的有效可行的方法是:()。...
Friday, September 16, 2022
Monday, September 12, 2022
Friday, September 16, 2022
问题:一件标识为10.00克的金项链,其重量测量值应在()范围内。...
Monday, September 12, 2022
Monday, September 12, 2022