A. 0.104 B. 0.130 C. 0.190 D. 0
A. 1.9251.984,0.040 B. 1.810-1.815,0.030 C. 1.810-1.815,0
A. 1 B. 1.5 C. 2 D. 2
A. 4.00 B. 4.25 C. 4.65 D. 4
A. 钻石 B. 立方氧化锆 C. 钛酸锶 D. 钆镓榴石