题目体心立方晶胞原子数,致密度分别是A. 2,0.68B. 4,0.74C. 2,0.74D. 4,0.68体心立方晶胞原子数,致密度分别是A. 2,0.68B. 4,0.74C. 2,0.74D. 4,0.68题目解答答案A. 2,0.68