二系垂向减振器用于控制车体与转向架之间的垂向振动，有利于控制车体的（）振动
参考答案：侧滚
已知某运动物体做变速直线运动，它的速度v是时间t的函数v（t），求物体在t=0到t=t0这段时间内所经过的路程。
根据句意及首字母提示完成下列句子
1. The animal w about 200 pounds.
2. The nose of the elephant is about two meters l .
3. It's dangerous for animals to drink if the water becomes p______．
4. The monkey is p .Lots of the visitors like it.
5. Pandas are e animals. We must protect them.
