在研究匀变速直线运动的实验中，如图是一条记录小车运动情况的纸带，并在其上取了A、B、C、D、E5个计数点，每相邻两个计数点之间还有4个点图中没有画出，电火花计时器接在50Hz的电源．
我国第一级阶梯与第二级阶梯的地理界线是（ ）
Time now
It's ____ in the morning.
Weather information
Snow has been falling since yesterday.
Suggested ways of transportation(交通工具)
____.
Influence to the school
Some schools in the countryside are ____
More information about the weather
____ will last for at least two more days.
Time for the next ____.
In two hours
