物体做平抛运动，它的速度方向与水平方向的夹角θ的正切值tanθ随时间t变化的图象是下图所示中的[ ]
A、
B、
C、
D、
答案：B
连词成句。
1. giraffe tall The is
2. right You are
3. deer the Look at
4. short is The deer
If we are not _______ the progress we have made, we will have greater success.
A．interested in
B．strict in
C．popular with
D．content with
