根据短文内容及首字母提示补全单词，使短文完整、通顺

    Nowadays, we are in a modern society. Everybody should be p____ in public. But sometimes some people like to c____ in line when they buy tickets or get on the bus or subway. They take other's places as well as time when they are in line, so it is i____. I can't s____ that. Sometimes, I even get mad when I see them cut in line.

    When this h____, I often say, “Would you mind w____ in line? ” But sometimes some of them are angry w____ me and they say, “It's none of your business. ” So I f____ angrier. Then I only tell it to the people who sell the tickets. At last the people who are breaking the r____ of etiquette don't get their tickets. So I am happy and the people who cut in line are u____.

如图所示，x轴上M点和N点的坐标分别是(0.5 m，0)、(2 m，0)，虚线MM′与y轴平行。在y轴和MM′之间加垂直纸面方向的匀强磁场，在N点固定一个正的点电荷 $Q=+1\times {10}^{-4}C$ 。现有一个质量 $m=3\times {10}^{-7}kg$ 、电荷量的大小 $q=1\times {10}^{-4}C$ 的粒子，从y轴上某点沿x轴的正方向以初速度 $v_0=1\times {10}^{4}m/s$ 进入磁场，在第四象限里一直做匀速圆周运动，最后从x轴上的Q点（没画出）射入第一象限，不计带电粒子的重力，粒子在磁场中运动时就不受在N点的固定点电荷影响。已知静电力常量k=9×10⁹ N·m²/C²。求：

2014年“五一”期间，高速公路车辆较多．某调查公司在一服务区从七座以下小型汽车中按进服务区的先后每间隔50辆就抽取一辆的抽样方法抽取40名驾驶员进行询问调查，将他们在某段高速公路的车速（km/t）分成六段：60，65），65，70），70，75），75，80），80，85），85，90）后得到如图所示的频率分布直方图．

（Ⅰ）求这40辆小型车辆车速的众数及平均车速（可用中值代替各组数据平均值）；

（Ⅱ）若从车速在60，70）的车辆中任抽取2辆，求车速在65，70）的车辆至少有一辆的概率．