A. 3.53 B. 3.22 C. 3.63 D. 3
A. 5 B. 5.5 C. 6 D. 6
A. 单斜 B. 三斜 C. 三方 D. 正交
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