A:16π3
B:19π3
C:19π12
D:4π3
若以抛出点为起点,取初速度方向为水平位移的正方向,则图中,能正确描述做平抛运动物体的水平位移x随时间t变化关系的图象是( )
What kind of structure is the sentence “The girl showed her classmates some of her family photos.”?