2021 National Question 3 Single-choice Differentiating 2021_新课标I Paper 3. 已知圆锥的底面半径为 $\sqrt { 2 }$ ,其侧面展开图为一个半圆,则该圆锥的母线长为( ) A. 2B. $2 \sqrt { 2 }$C. 4D. $4 \sqrt { 2 }$ Answer keyB ☆ SaveCan't do it, show the explanation查看原卷 →