题干
This box is_______ that one.
A：heavy than
B：so heavy than
C：heavier as
D：as heavy as
答案(点此获取答案解析）
D
This box is_______ that one.
A：heavy than
B：so heavy than
C：heavier as
D：as heavy as
个单位长度的速度沿射线BC同时向上平移，直至正方形的顶点E落在y轴上时，正方形和抛物线均停止运动．