2021 Beijing Question 4 Single-choice Differentiating 2021_北京卷 (2021) 4.某四面体的三视图如图所示,该四面体的表面积为() A. $\frac{3+\sqrt{3}}{2}$B. 4C. $3+\sqrt{3}$D. 2 Answer keyA ☆ SaveCan't do it, show the explanation查看原卷 →