甲、乙两物体从同一地点由静止开始向同一方向运动，它们的加速度（a）与时间（t）的关系图象如图所示．在0～t₀时间内，下列关于两物体运动的说法中，不正确的是（   ）

从方框中选择适当的单词, 并用其适当形式完成下面的短文。

    Many students in the US always ____ the bus to school every day. Parents think taking the school bus is very ____. But sometimes it is also dangerous(危险的). Some students were injured (受伤的) ____they didn't follow the school bus rules. What are the school bus ____?

____ at the bus station early.

Wait ____ the bus at the bus station.

____ play around the bus station.

Don't run here and there at the bus station.

Don't walk ____ fight on the bus when it is going.

Don't get off the bus if it doesn't stop.

____ rules are good for students. Follow ____, and you can keep yourself safe.

化简 ${\left(\frac{27}{125}\right)}^{-\frac{1}{3}}$的结果是（　　）

下面是近代历史上某国的统治区域（红色部分）版图。从该图可以推知当时（）