2021 National Question 5 Single-choice Differentiating 2021_新课标II Paper 5. 正四棱台的上、下底面的边长分别为2,4,侧棱长为2,则其体积为( ) A. $2 0 + 1 2 \sqrt { 3 }$B. $2 8 \sqrt { 2 }$C. $\frac { 5 6 } { 3 }$D. $\frac { 2 8 { \sqrt { 2 } } } { 3 }$ Answer keyD ☆ SaveCan't do it, show the explanation查看原卷 →