直线外一点到这条直线的垂线段的______，叫做点到直线的距离．
直线外一点到这条直线的垂线段的长度，叫做点到直线的距离，
故答案为：长度．
____ I have a lot of homework to do every night. I still spend half an hour watching TV. [ ]
A. If
B. Because
C. After
D. Even though
简述绩效预算模式及其要点。
