()主要是通过宪法和法律,来实现民主政治的政治形态或政治过程。
参考答案:宪政
点P在锐角△ABC的边上运动,试确定点P的位置,使PA+PB+PC最小,并证明你的结论.
---Can your father drive?
---Yes, and he to work every day.
A.is driving
B.drove
C.drives
D.has driven