有问题就有答案
Q1：诚求大家帮忙！
The business began in 1940, with a restaurant opened by brothers Dick and Mac McDonald in San Bernardino, California. Their introction of the "Speedee Service System" in 1948 established the principles of the modern fast-food restaurant. The original mascot of McDonald"s was a man with a chef"s hat on top of a hamburger shaped head whose name was "Speedee." Speedee was eventually replaced with Ronald McDonald in 1963.The first McDonald"s restaurants opened in the United States, Canada, Costa Rica, Japan, the Netherlands, Germany, Australia, France, El Salvador and Sweden in order of openings.The present corporation dates its founding to the opening of a franchised restaurant by Ray Kroc, in Des Plaines, Illinois on April 15, 1955[7] , the ninth McDonald"s restaurant overall. Kroc later purchased the McDonald brothers" equity in the company and led its worldwide expansion and the company became listed on the public stock markets in 1965.[8] Kroc was also noted for aggressive business practices, compelling the McDonald brothers to leave the fast food instry. The McDonald brothers and Kroc feuded over control of the business, as documented in both Kroc"s autobiography and in the McDonald brothers" autobiography. The site of the McDonald brothers" original restaurant is now a monument.With the expansion of McDonald"s into many international markets, the company has become a symbol of globalization and the spread of the American way of life. Its prominence has also made it a frequent topic of public debates about obesity, corporate ethics and consumer responsibility.Facts and figuresMcDonald"s restaurants are found in 119 countries and territories around the world and serve nearly 47 million customers each day. McDonald"s operates over 31,000 restaurants worldwide, employing more than 1.5 million people. The company also operates other restaurant brands, such as Piles Café.Focusing on its core brand, McDonald"s began divesting itself of other chains it had acquired ring the 1990s. The company owned a majority stake in Chipotle Mexican Grill until October 2006, when McDonald"s fully divested from Chipotle through a stock exchange. Until December 2003, it also owned Donatos Pizza. On August 27, 2007, McDonald"s sold Boston Market to Sun Capital Partners.Types of restaurantsMost standalone McDonald"s restaurants offer both counter service and drive-through service, with indoor and sometimes outdoor seating. Drive-Thru, Auto-Mac, Pay and Drive, or McDrive as it is known in many countries, often has separate stations for placing, paying for, and picking up orders, though the latter two steps are frequently combined; it was first introced in Arizona in 1975, following the lead of other fast-food chains. In some countries "McDrive" locations near highways offer no counter service or seating. In contrast, locations in high-density city neighborhoods often omit drive-through service. There are also a few locations, located mostly in downtown districts, that offer Walk-Thru service in place of Drive-Thru.Specially themed restaurants also exist, such as the "Solid Gold McDonald"s," a 1950s rock-and-roll themed restaurant. In Victoria, British Columbia, there is also a McDonald"s with a 24 carat (100%) gold chandelier and similar light fixtures.To accommodate the current trend for high quality coffee and the popularity of coffee shops in general, McDonald"s introced McCafé. The McCafé concept is a café-style accompaniment to McDonald"s restaurants in the style of Starbucks. McCafé is a concept of McDonald"s Australia, starting with Melbourne in 1993. Today, most McDonald"s in Australia have McCafés located within the existing McDonald"s restaurant. In Tasmania there are McCafés in every store, with the rest of the states quickly following suit. After upgrading to the new McCafe look and feel, some Australian stores have noticed up to a 60% increase in sales. As of the end of 2003 there were over 600 McCafés worldwide.Some locations are connected to gas stations/convenience stores,[15] while others called McExpress have limited seating and/or menu or may be located in a shopping mall. Other McDonald"s are located in Wal-Mart stores. McStop is a location targeted at truckers and travelers which may have services found at truck stops.PlaygroundsSome McDonald"s in suburban areas and certain cities feature large indoor or outdoor playgrounds, called "McDonald"s PlayPlace" (if indoors) or "Playland" (outdoors)[citation needed]. The first PlayPlace with the familiar crawl-tube design with ball pits and slides was introced in 1987 in the USA, with many more being constructed soon after. Some PlayPlace playgrounds have been renovated into "R Gym" areas."R Gyms" are in-restaurant play area that features interactive game zones designed for children aged 4 to 11. They are equipped with stationary bicycles attached to video games, dance pads, basketball hoops, monkey bars, an obstacle course, and other games which emphasize physical activity.The "R Gym" features the Toddler Zone, an active play environment with age appropriate games that develop physical coordination and social skills; the Active Zone, designed for children aged four-to-eight that promotes physical fitness through fun play; the Sports Zone which features a series of sport oriented activities to promote aerobic exercise for children aged 9-to-11; the Parent Zone which features seating and provides a monitoring area for their children; and the Dining Area which allows families to eat.RedesignIn 2006, McDonald"s introced its "Forever Young" brand by redesigning all of their restaurants, the first major redesign since the 1970s.[18][19]The new design will include the traditional McDonald"s yellow and red colors, but the red will be muted to terra cotta, the yellow will turn golden for a more "sunny" look, and olive and sage green will be added. To warm up their look, the restaurants will have less plastic and more brick and wood, with modern hanging lights to proce a softer glow. Contemporary art or framed photographs will hang on the walls.The exterior will have golden awnings and a "swish brow" instead of the traditional double-slanted mansard roof.The new restaurants will feature areas:The "linger" zone will offer armchairs, sofas, and Wi-Fi connections. The "grab and go" zone will feature tall counters with bar stools for customers who eat alone; Plasma TVs will offer them news and weather reports. The "flexible" zone will be targeted toward families and will have booths featuring fabric cushions with colorful patterns and flexible seating. Different music targeted to each zone. Branches in the United Kingdom have an even more contemporary look and feel to the stores, replacing the red with a deep British racing green and overall making the stores look more casual, similar to a Starbucks branch.Business modelMcDonald"s Corporation earns revenue as an investor in properties, a franchiser of restaurants, and an operator of restaurants. Approximately 15% of McDonald"s restaurants are owned and operated by McDonald"s Corporation directly. The remainder are operated by others through a variety of franchise agreements and joint ventures. The McDonald"s Corporation"s business model is slightly different from that of most other fast-food chains. In addition to ordinary franchise fees and marketing fees, which are calculated as a percentage of sales, McDonald"s may also collect rent, which may also be calculated on the basis of sales. As a condition of many franchise agreements, which vary by contract, age, country, and location, the Corporation may own or lease the properties on which McDonald"s franchises are located. In most, if not all cases, the franchisee does not own the location of its restaurants.The UK business model is different, in that fewer than 30% of restaurants are franchised, with the majority under the ownership of the company. McDonald"s trains its franchisees and others at Hamburger University in Oak Brook, Illinois.In other countries, McDonald"s restaurants are operated by joint ventures of McDonald"s Corporation and other, local entities or governments.As a matter of policy, McDonald"s does not make direct sales of food or materials to franchisees, instead organizing the supply of food and materials to restaurants through approved third party logistics operators.According to Fast Food Nation by Eric Schlosser (2001), nearly one in eight workers in the U.S. have at some time been employed by McDonald"s. (According to a news piece on Fox News this figure is one in ten). The book also states that McDonald"s is the largest private operator of playgrounds in the U.S., as well as the single largest purchaser of beef, pork, potatoes, and apples. The selection of meats McDonald"s uses varies with the culture of the host country.Shareholder DividendsMcDonald"s has increased shareholder dividends for 25 consecutive years[20] making it one of the S&P; 500 Dividend Aristocrats[21][22] with the highest annual dividends of publicly traded companies in the fast food instry McDonald"s predominantly sells hamburgers, various types of chicken sandwiches and procts, French fries, soft drinks, breakfast items, and desserts. In most markets, McDonald"s offers salads and vegetarian items, wraps and other localized fare. Portugal is the only country with McDonald"s restaurants serving soup. This local deviation from the standard menu is a characteristic for which the chain is particularly known, and one which is employed either to abide by regional food taboos (such as the religious prohibition of beef consumption in India) or to make available foods with which the regional market is more familiar (such as the sale of McRice in Indonesia).
Q2：为什么5号电池称为AA电池？7号电池称为AAA电池？
AA电池是美国的干电池标准，中国大陆的5号电池与其标准兼容，所以5号电池也叫AA电池。AAA电池是美国干电池标准，兼容中国大陆7号电池或台湾省4号电池标准。是普通电池，比AA电池小，所以7号电池也叫AAA电池。资料五号电池型号：SC型号也不常见，通常是电池组内部的电芯，电动工具、相机、进口设备中都有。标准SC(平头)电池高度为42.00.5毫米，直径为22.10.2毫米，型号C为2号电池，用途很多。标准的C(平头)电池高度为49.50.5毫米，直径为25.30.2毫米，D型为一号电池，用途广泛，可在民用、军用、特种d C电源中找到。标准D(平头)电池的高度为59.00.5毫米，直径为32.30.2毫米。n型号并不常见，用途也很少。标准n(平头)电池的高度为28.50.5毫米，直径为11.70.2毫米.参考：百度百科《五号电池》百度百科《AAA电池》。
Q3：电瓶车电池6-DZM-12 6-DZM-20 6-DZF-12这些都是什么意思啊
1.它是电动汽车电池的型号符号，6指电池数量，分别为2V6和12V，DZM指的是电力和助力车的免维护电池，第一个拼音字母表示电量、辅助和豁免。12表示额定容量为12安培小时。2.以6-DZM-14为例：其中6表示蓄电池包含6个小电池，每个电池的电压为2V，所以这款车型的电池电压为12V；14表示电池容量为14Ah；英文字母DZM源自几个工业术语的拼音首字母。d代表电力，z代表辅助电力，m代表密封。因此，6-DZM-14电池为12V14Ah，可用作电动车和轻便摩托车的密封电池。延伸数据：电动汽车的电池是电动汽车的动力源。电动汽车大多配备铅酸电池，成本低，性价比高。这种电池被称为“铅酸电池”，因为它可以充电和重复使用。12V铅酸电池的最低保护电压为10.5V，如果是36V电池组，最低预留电压为31.5V，大多数汽车厂商采用的控制器的欠压保护电压也是31.5V.表面上看这是对的，但实际上，当36V电池组只剩下31.5V时，由于电池容量差，肯定会有电压低于10.5V的电池，电池会处于过放电状态。此时，过放电电池的容量急剧下降，此时电池的损坏不仅影响单个电池，还会影响整个电池的寿命。事实上，当电池电压低于32V，达到27V时，增加的行驶容量不到2公里，但对电池的损害非常大。只要这种情况发生10次，电池的容量就会低于标称容量的70%。参考：百度百科-电动车电池。
Q4：干电池为什么叫"2号"，"5号"，"7号"？
所谓的电池数量，是按照体积递减的顺序用数字排序，依次编号，没有什么特别的含义。根据GB/T 8897.1-2013一次电池标准，电池规范以IEC规范的名义定义。例如R20、R6、R03分别代表1号、5号、7号等传统编号方式。但由于用户习惯，商品名称中仍保留1号、5号、7号等编号方式。R系列电池型号中的R代表圆形单电池，这个字母和后面的数字代表电池的标称尺寸。1号电池，国标型号R20，英文代号D，直径34.2毫米，高度61.5毫米2号电池，国标型号R14，英文代号C，直径 26.2毫米；高度50.0毫米.5号电池，国标型号为R6，英文代号为AA，直径为14.5mm；高度50.5毫米.7号电池，国标型号R03，英文代号AAA，直径10.5mm；高度44.5毫米.干电池一般分为：1号、2号、3号、5号、7号，其中5号、7号特别常用。所谓AA电池就是5号电池，而AAA电池就是7号电池！AA和AAA都是电池型号。常见的“AAAA、AAA、AA、A、SC、C、D、N、F”AAAA车型不多见，偶尔还能看到一次性AAAA高能碱性电池，一般用于电脑笔。标准AAAA(平头)电池的高度为41.50.5毫米，直径为8.10.2毫米。AAA电池很常见。一般MP3用的都是AAA电池。标准的AAA电池高度为43.60.5毫米，直径为10.10.2毫米，AA电池众所周知，数码相机和电动玩具是AA电池不可或缺的。标准AA电池的高度为48.00.5毫米，直径为14.10.2毫米。只有一个A型电池不寻常。该系列通常用作电池组内部的电池芯。我经常给别人换旧相机的镍镉和镍氢电池，几乎都是4/5A或者4/5SC电池。标准的A(平头)电池高度为49.00.5mm，直径为16.80.2mm，SC型号也不常见，通常是电池组内部的电芯，电动工具、相机、进口设备中都有。标准SC(平头)电池的高度为42.00.5毫米，直径为22.10.2毫米.C型是2号电池，用途很多。标准的C(平头)电池高度为49.50.5毫米，直径为25.30.2毫米，D型为一号电池，用途广泛，可在民用、军用、特种d C电源中找到。标准D(平头)电池高度59.00.5mm，直径32.30.2mm，N型号不常见，不知道用在什么地方。标准的N(平头)电池高度为28.50.5毫米，直径为11.70.2毫米，现在电动助力车和动力电池的新一代产品F型电池有很大的替代铅酸免维护电池的趋势，一般作为电芯使用(个人意见：太大了，不能单独使用，呵呵)。标准的N(平头)电池高度为89.00.5毫米，直径为32.30.2毫米，注意(平头)一词是指电池的正极是平的，没有突起，用作电池组点焊的电芯。一般同类型的尖端(可作为单节电池的电源)高度多0.5毫米。以此类推，我就不一一解释了。还有，电池很多的时候，也不是“AAA、AA、A、SC、C、D、N、F”的正规主力车型，前面往往有“1/3、2/3、1/2、2/3、4/5、5/4、7/5”的分数。这些分数表明：例如，“4/5A”是指高度是一般A电池的4/5的可充电电池。还有一种模型表示方法，是五位数，比如14500、17490、26500。前两位是指细胞体的直径，后三位是指细胞体的高度。比如14500指AA电池，直径约14毫米，高50毫米。
Q5：电池上的字母标识是什么意思
电池上的字母“r，s，f”代表电磁场的形状。电池通常标有R55、R5等符号。r代表电池的大小。根据IEC61960标准，锂离子电池的标识由三个字母和几个数字组成。1.电池容量由电池中活性物质的量决定，通常表示为毫安时或安培小时。例如，通过1a的1小时电流放电，1000 mAh可以转换为大约3600摄氏度。2.充电终止电压。当充电电池充满电时，电池板上的活性物质已经达到饱和状态。如果给电池充电，电压不会升高。此时，该电压称为充电终止电压。锂离子电池为4.2伏或4.35伏。3.放电终止电压是电池放电时允许的最小电压。终止电压与放电速率有关。一般来说，单位锂离子电池为2.7伏。4.第一个字母表示电池负极材料，I:锂离子电池，l:锂金属电极或锂合金电极。5.第二个字母表示电池正极材料，C:钴基电极，N:镍基电极，M:锰基电极，V:钒基电极。6.第三个字母表示电池的形状，r:圆柱形电池，p:方形电池。扩展信息：标称电压电池正负极之间的电位差称为电池标称电压。标称电压由极板材料的电极电位和内部电解质的浓度决定。锂的放电曲线呈抛物线形，从4.3V到3.7v，从3.7V到3.0v变化很快，只有3.7V左右的放电时间最长，约占放电时间的3/4，所以锂电池的标称电压就是维持最长放电时间的电压。锂电池的标称电压为3.7V和3.8V，如果是3.7V，充电终止电压为4.2V，如果是3.8V，充电终止电压为4.35V，圆柱形电池型号用5位数字表示，分别是电池的直径和高度。前两个代表直径，后两个代表高度，直径为毫米，高度为0.1毫米.当直径或高度大于或等于100毫米时，应在两个尺寸之间增加一条对角线。方形电池的型号由六位数字表示。前两位数字代表电池的厚度，中间两位数字代表宽度，最后两位数字代表高度，单位为毫米。如果三个尺寸中的任何一个大于或等于100 mm，则应在尺寸之间添加对角线。如果三种尺寸中的任何一种小于1毫米，应在尺寸前加上字母t。尺寸单位为0.1毫米.纽扣电池的型号用四位数字表示。前两个代表直径，后两个代表高度。该单位直径为毫米，高度为0.1毫米。参考来源：百度百科-锂电池logo。
Q6：电气的高手进来帮忙
我不是大师，只是提个建议。如果你联系供电局，可以让他们帮你提问题。每年有三类人的安全规定和考试，题目都是现成的。况且百度上的高手不多，而且有高手，你可能随时都不会在网易电商论坛或者中国电力社区发布，比这里好。