已知等比数列{an}的前n项和为Sn,若S4、S2、S3成等差数列,且a2+a3+a4=﹣18,若Sn≥2016,则n的取值范围为____
— Excuse me, Dad, but I'm going to the club to meet my friends in the football team.
— Ok. _____.
It seems very difficult to ________ the child crying. Please take him to his mother.
所有血管中,血流速度最快的是( )