一个正方体的棱长扩大4倍，它的表面积就扩大（ ）倍，体积就扩大（ ）倍。
16；64
As the crowd rushed towards the gate, several people got______.
A．knocking down
B．knocked off
C．knocking on
D．knocked over
“三不动火”的内容是什么？
