—The final round of the competition is coming near. Can I really do well this time?—Believe in ______. You're always the best in our school.
A:you
B:your
C:yours
D:yourself
too和food中的“oo”字母组合发音相同。
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____