A:Si
B:P
C:S
D:Cl
When the children saw the snake, they all ran away in fear.
文明家庭就意味着____和谐。
将抛物线向右平移3个单位长度,再向下平移2个单位长度,得到的抛物线为y=x2﹣4x,那么原来抛物线的解析式是____