已知原点O（0，0），则点O到直线4x+3y+5=0的距离等于 ______．
利用点到直线的距离公式得到d=|5|42+32=1，
故答案为1．
— is she?
—She is my mother.[ ]
A. What
B. Who
C. Where
用所给词的适当形式填空。
1. Peter should _____ (allow) to take the test later.
2. What school rules do you think should _____ (change)?
