— Miss Liu, when did you come here?
— In 2015. I here for two years.
A:have been to
B:have gone to
C:have come
D:have been
新加坡的气候类型属于____ .
赛龙舟时,每个运动员坐定在船的两侧,随着有节奏的号子声,大家齐心合力划动木桨,使船在水中快速前进的力是( )
计算(a6b3)÷(2a3b2)的结果是( )