His father told him closely to the bears.
A:not to go
B:not go
C:don’t go to
D:doesn’t go to
一物体运动的速度随时间变化的关系如图所示,根据图像可知( )
青春期是一生中身体发育和智力发展的黄金时,下列关于青春期发育特点的描述,错误的是( )