What time does Ann ______ every day?
A:go school
B:go to the school
C:go to school
已知等差数列{an}的前n项和为Sn,且S2=10,S5=55,则过点P(n,an)(n∈N*)和Q(n+2,an+2)(n∈N*)的直线的一个方向向量坐标可以是( )
方共____画,分共____画。