2010 National Question 10 Single-choice Differentiating 2010_老新课标卷 (2010·理) (10)设三棱柱的侧棱垂直于底面,所有棱长都为 $a$ ,顶点都在一个球面上,则该球的表面积为 A. $\pi a^{2}$B. $\frac{7}{3} \pi a^{2}$C. $\frac{11}{3} \pi a^{2}$D. $5 \pi a^{2}$ Answer keyB ☆ SaveCan't do it, show the explanation查看原卷 →