2014 National Question 5 Single-choice Differentiating 2014_退役省自主命题 (2014·理) 8.从正方体六个面的对角线中任取两条作为一对,其中所成的角为 $60^{\circ}$ 的共有 A. 24 对B. 30 对C. 48 对D. 60 对 Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →