早餐和晚餐合起来说（英语单词）

It is necessary for us to have breakfast every morning.

have eggs and salad for breakfast

你好,如下：As people are very occupied with their work, they go to work directly in the morning without breakfast. Some people think it impossible to influence on their body health without eating breakfast,others believe breakfast is important to people`s body health.As far as I`m concerned, I`m convinced that we`re supposed to have breakfast because it is beneficial to our body health.
First of all, breakfast offers us the energy that we need in the day. Before breakfast, our body has consumed all the energy that we get from previous meals. Therefore, we need to eat some food in the morning to get enough energy and nutrient to support our body. If we don`t have breakfast, then we will have no enough energy to do our work or study efficiently.
Secondly, people who skip breakfast will get lots of weight easily. If you don`t have breakfast, then you will eat more food at noon and in the evening.Anyway, people are supposed to eat breakfast for the good of our health and for the good of keeping a good body shape.
满意请速速采纳,谢谢合作!

与成年人相比,处于青春期的少年更应吃好早餐,这是因为青春期身体生长发育较快,新陈代谢过程中的同化作用强于异化作用

A、淀粉主要存在于植物和种子和块茎中，故馒头、面条中含有淀粉，所以A正确．
B、酸牛奶呈酸性，pH＜7，所以B错误．
C、蛋白质主要存在于动物肌肉、奶类、蛋类、豆类及制品中，所以正确．
D、维生素主要存在于蔬菜和水果中，所以正确．
故选B．

1. When do you have your breakfast?
2. I leave home at five to eight.
3. Amy gets up at a quarter to seven.
4. Peter arrives school at five pass eight.

It is important to eat a healthy diet.
You can have bread,an egg,and some milk for breakfast.You can have a bowl of rice,some vegetables,and meat or fish for lunch.
You can eat some rice and noodles.
You have to eat some fruit and do more exercise.

Li Ming is a student of Grade Two. Last Saturday, his parents went to the country. They left him by himself at home for the first time. He got up at 7:20. He hurried to run to school with his schoolbag without having his breakfast. When he came to the school, the gate was closed. Nobody was inside the school. He suddenly remembered it was weekend. He didn't need to go to school. ( He laughed at last and went home happily.)

when i got up ,mother has already bought the breakfirst and came back home.

I like vegetables for breakfast.
一楼狂汗～

解题思路：此题考查的是对合理膳食的认识．合理的一日食谱：一日三餐的能量供给分别为30%、40%、30%．

合理膳食是指每日均衡的吃膳食宝塔中的五类食物；一日三餐，按时进餐；每日早中晚能量比例为：30%、40%、30%．因此，选项B符合题意．
故选：B．

点评：
本题考点： 注意合理营养．

考点点评： 青少年正处于生长发育时期，应食足够的糖类、适量的蛋白质、一定量的水、无机盐、脂肪、维生素和纤维素，以保证正常的生长发育．合理科学膳食，不偏食．

A7
A

A,早上应该补充蛋白质.

1. would you please buy me some breakfast,because i did not have anything this mornng. and i will pay you back, thank you!
2. Would you please bring me something to eat?
3. please bring me some bread and milk, plus two chocolates.
4. please see if it is dirty at the back of my dress? if there is any dust, please help me get it off.

1 Traditional Britishi food is mainly beef,lamb,chicken,fish and pork,with
2.Traditional British breakfast includes string beans,chicken,bacon,toast and mushroom.
3.We should rectify and regulate the order of maket economy,seeking both temporary and permanent solutions.
4.In UK,coffe is as popular as tea.Please drink coffee adding milk and sometimes without adding.Some drink grinding coffee and some drink instant coffee.
5.The first important thing is to deal with the stable relaitionship between reform and development.
6.I believe performance management is the most effective way of managing staff.
7.We need adjust the relationship between nations and enterprises.
8.It is a special thing for most family to bake Christamas cookies and decorate house.

早餐你妈妈喜欢吃什么?
What does your mother like for breakfast?

Having breakfast is good for our health,it can provide energy to us. But if we never have breakfast, we may feel illness. We can have some bread and milk for breakfast.

I usually have a glass of milk and a piece of bread for breakfast.
But for lunch,I prefer to have pizza.Sometimes I have noodles.
And for dinner I usually have rice,meat,fish and vegetabl
Do you know how to keep healthy First,eat different foods,especially fruit ,fish,meat and vegetables.You may have a favourite food,but you'd better eat something different,if you eat different foods,you will probably get more nutrients your body needs.You should have breakfast because it's very important for you.Second,drink water and milk as often as possible.Milk is a great drink that can give you more calcium your body needs to grow strong bones.Fourth,limit screen time.Screen time is the time you watch TV,DVDs and videos,or using computers.It is good to take more exercise such as basketball,bike riding and swimming.You can't watch TV for more than two hours a day.Fifth,be active.One thing you'd like to do as a kid is to find out which activity you like best.

他上班从来没有迟到.He ( was never ) late( for ) work.
.早餐你们常常吃什么?(What ) do you usually ( have / eat ) for breakfast?
不是很喜欢,因为对身体不好.No not very much.Because it's not( good for ) us.
.你通常下午几点放学回家?What ( time ) do you ( do ) get gome ( from ) school in the ( afternoon)?
我的爷爷和奶奶每天早起散步2小时.他们过着健康的生活.My ( grandparents ) get up ( early ) every day and ( have ) a ( walk ) for two ( hours ) .They ( live ) a very( happy ) life.

解题思路：众数是数据中出现次数最多的数．

数据中出现次数最多的数是3，出现了4次，故众数是3．
故选A．

点评：
本题考点： 众数．

考点点评： 本题考查了众数的概念．

1.
The Importance of Breakfast
Since I have a sense,exactly since I was born,I know food is important.If you didn't take any one of the three meals,which are breakfast,lunch,supper,you will fill hungery,no energy or power.Interestingly,when we were babies ,can't speak and feel hungery,we would mostly cry.Then Mom would give us man-milk.What a happy time for us babies at that moment!
Someone ever said,"eat well at breakfast;eat enough at lunch;eat less at supper".
Do you agree with the idea ?
Well,I find out some information on the internet,copy them,paste them on my blog.
Suggest the visitors who come across read it carefully!
俗话说："早饭要吃好,午饭要吃饱,晚饭要吃少",就说明了早餐的重要性.
早上为一日之始,是人们一天活动的起步.整个上午是工作、劳动或学习的重要阶段.因此,从营养卫生学的角度出发,应把早餐调剂得可口些、营养些、多样化些 .要端正对早餐的进食态度,调整生活规律,讲究科学进餐.
在早餐问题上大致有两种不良情况,一种是早上起的晚,匆匆忙忙赶着上班,因而只能随便吃上几口,或热热残羹剩饭.一种是根本不良早餐.或因为没时间,或因 要减肥.这两种做法都是错误的,是不可取的,也是不科学的.这些不良的早餐进食习惯一旦养成,不仅无法满足人体内正常进食营养的需要,而且还会破坏生活的节奏和规律,久而久之给人体带来危害.
美国科学家对患胆结石的病人作了调查研究,发现胆结石患者与长期不吃早餐有关.因为空腹过久,胆固醇的含量不变,形成高胆固醇胆汁.胆固醇过高就容易在胆囊中积累起来,形成结石核心的物质.
尤其学生要吃好早餐.学习是繁重的脑力劳动,大脑活动需要足够的能量和营养,而头一天吃的晚餐经过一夜消耗,早已用完.缺乏早餐营养的学生,由于能量和营养不足,会出现反应迟钝、精力不足等保护性抑制.所以,早餐吃得好坏,对于学业在身,又正处于生长发育阶段的学生健康影响很大.
2.
The importance of eating breakfast
Your brain (and central nervous system) run on glucose -- that's the fuel you need to think, walk, talk, and carry on any and all activities. Let's say that the last time you eat something at night is at 10 or 11 PM (not optimal, just an example). The following day, you don't eat breakfast but wait until about noon or so to eat -- you've gone thirteen or fourteen hours with nothing in your system.
Your poor brain is surely deprived -- and your body has to work extra hard to break down any stored carbohydrate or turn fat or protein into a usable form for your brain to function. That's a lot to ask for when you're sitting in a classroom, trying to concentrate on reading, or doing any other work. Eating breakfast has been proven (many times) to improve concentration, problem solving ability, mental performance, memory, and mood. You will certainly be at a disadvantage if your classmates have eaten breakfast and you've gone without. On average, they will think faster and clearer, and will have better recall than you. School or work can be tough enough without this extra added pressure.
Breakfast skippers also have a harder time fitting important nutrients into their diet. Many foods eaten at breakfast contain significant amounts of vitamins C and D, calcium, iron, and fiber.
Some people believe that skipping breakfast may help them lose weight. Not so! Skipping meals often leads to overeating later in the day. Becoming overhungry often leads to a lack of control and distorted satiety signals (meaning it's hard to determine when you're full). This can result in taking in more calories than if one had an appropriate breakfast. As a matter of fact, it's easier to control one's weight by eating smaller meals and snacks more frequently.
What if there's just no time in the morning to eat breakfast? There are plenty of items you can bring along with you to school or work. Carry a resealable bag of easy-to-eat whole grain cereal, or bring a yogurt or small box of skim milk, juice, or fruit. If you just can't stomach food in the morning, try to have a little something -- such as some juice -- and bring along a mid-morning snack. Other good portable items include: whole grain crackers, a hard boiled egg, cottage cheese, low-fat granola bars, or even a peanut butter sandwich. Single serving hot cereals, such as oatmeal, are handy -- all you have to do is add hot water, available at most cafeterias or delis.
Whatever your choice, eat something. If you think you're doing fine with no breakfast, just try changing your tune for a week -- Alice is sure you'll notice a difference. You will undoubtedly perform better with some fuel in your system, and, hopefully, become a breakfast believer.

3.The Importance of Eating Breakfast

很多人由于生活、学习等事情每天都很匆忙,为了赶时间,他们大多不吃早餐……同学们,你们每天都吃早餐吗?你们觉得早餐重要吗?请看：
Does it matter if you don't eat breakfast? A short time ago, an experiment was carried out in the USA to find out the answer to this question. People of different ages, from 12 to 83, were asked to take the test. During① the test, these people were given all kinds of breakfasts and sometimes they got no breakfast at all. Scientists wanted to see how well their bodies worked when they had eaten different kinds of breakfasts.
The results② showed that if a person eats the right breakfast, he or she will work better than if he or she has no breakfast. If a student has fruit, eggs, bread and milk before going to school they will learn more quickly and listen more carefully in class.
The result is opposite③ to what some people think. Having no breakfast will not help you lose weight. This is because people become so hungry at noon that they eat too much for lunch. They will gain weight instead of ④ losing it. You will lose more weight ⑤ if you reduce ⑥ the amount of food you eat at other meals.

Husband wife wake up immediately to prepare for breakfast

Nowadays lots of people enjoy eating out.All this happens because we have more money in our pockets than before.People have different opinions about eating out.Some say that by eating out they cansay

1, Everything is / has been prepared.
2, What a nice breakfast!
3, Enjoy yourself! / Help yourself!

I am having the breakfast cooked by my mother.
特指某个早餐要用the.

解题思路：此题主要考查消化系统的组成和各部分功能有关知识点，以及合理膳食利于人体的健康成长的影响．图示①肝脏、②胆囊、③胰腺、④小肠．据此解答．

（1）葡萄糖被吸收后，这些物质会随着血液循环到达身体的各个部位，通过物质交换进入人体细胞．人体细胞内有能量转换器线粒体，线粒体能将细胞中的有机物在氧的参与下分解为二氧化碳和水，同时将有机物中的化学能释放出来，供细胞利用．
（2）肉粽和牛肉羹中含有丰富的糖类、蛋白质、脂肪类等物质盐，但是缺乏的营养物质是维生素，所以从合理膳食的角度看，请你给她加道炒青菜．
（3）糖类、蛋白质和脂肪必须经过消化才能吸收．淀粉的消化是从口腔开始的，在口腔中淀粉被初步分解为麦芽糖，再到小肠中在肠液和胰液的作用下，被彻底分解为葡萄糖；蛋白质的消化从胃开始的，在胃液的作用下被初步消化，再到小肠中在肠液和胰液的作用下，被彻底分解为氨基酸；脂肪的消化开始于小肠，先是胆汁（包含任何消化酶）将脂肪颗粒乳化为脂肪微粒，再在肠液和胰液的作用下，被彻底分解为甘油和脂肪酸．所以某同学摄入的混合性食物在消化道内消化、分解，最终得到一组消化终产物是氨基酸、葡萄糖、甘油、脂肪酸．
所以消化道内，消化淀粉、蛋白质的起始部位依次是口腔、胃．
（4）淀粉、脂肪、蛋白质等大分子的、不溶于水的有机物，则必需在消化道内被分解为小分子的能溶于水的物质后才能被人体吸收；淀粉的消化开始于口腔，在口腔中唾液淀粉酶的作用下被分解成麦芽糖，胃不能消化淀粉，在小肠内淀粉被彻底消化为葡萄糖；蛋白质的消化起始于胃，在小肠内被彻底分解为氨基酸；人体的消化腺中最大的消化腺是肝脏，它分泌的胆汁，对脂肪的消化有促进作用．
小肠长约5～6m，小肠内具有肠液、胰液和胆汁等多种消化液；小肠内壁有环形皱襞，皱襞上有小肠绒毛，增大了消化和吸收的面积；小肠绒毛内有毛细血管和毛细淋巴管，小肠绒毛壁、毛细血管壁、毛细淋巴管壁都只由一层上皮细胞构成，有利于营养物质的吸收进，因此小肠是消化食物和吸收营养物质的主要场所．参与消化的有：肠腺分泌的肠液、胰腺分泌的胰液和[肝脏]分泌的胆汁．
故答案为：（1）线粒体；能量；（2）炒青菜；（3）口腔；胃；（4）④；胰腺；①．

点评：
本题考点： 食物的消化和营养物质的吸收过程；各种消化腺的位置和功能．

考点点评： 这部分内容是考试的重点，要注意理解和掌握．

（1）小亮第天买早餐花多少元
（2）小亮一个星期买早餐花多少元
（3）现有的钱够小亮买多少天的早餐

Anny eats egg,orange and banana for breakfast.

3+2+1=6
112÷6=56/3
面粉56/3×3=56(千克),
鲜肉56/3×2=112/3(千克),
青菜56/3×1=56/3(千克),

This is my good friend Jim green.
He likes eating tomatoes as breakfast but don't like carrot.Mr.Green and Mrs.Green like eating tomatoes as breakfast but don't like carrot.
Mr.Green likes eating eggs as breakfast.

How about having some eggs for breakfast?

（1）公民维护权利包括三方面内容：依法享有权利，依法行使权利，尊重他人的权利。
（2）公民自觉履行义务主要应做到：法律鼓励的积极去做，法律要求的必须去做，法律禁止的坚决不做。

食醋中含有醋酸，醋酸显酸性，能和碳酸氢钠反应生成醋酸钠、水和二氧化碳，所以她可用食醋来除去多余食碱．
故选：B．

1,
Not eating breakfast is harmful to people's health.And if you feel hungry,you can't listen to what the teachers say clearly and effectively.And you can't get good marks when you take part in a test.Nowadays many students go to school without eating breakfast.It is a bad habit.It will make your body unhealthy.
2,
Good Eating Habits
Nowadays more and more middle school students do not pay enough attention to their health.Some get into a habit of not having breakfast,some like eating snack and junk food,and others eat too much.All these would bring about health problems.They can be short of nutrition,get overweight and suffer diseases more easily.
In my opinion,we middle school students are supposed to have breakfast,because not having breakfast would do harm to our bodies.We'll feel hungry can't do well in our lessons in the moring.What's more ,we need energy to deal with all kinds of problems in our studies.

解题思路：（1）根据条形图上的数据，求出常不吃早餐的人数占全部统计人数的百分比；再根据不注意营养搭配的有138人，不注意营养搭配的占60%，求出每天吃和经常吃早餐的人数，再根据经常吃早餐的人数和经常吃早餐中注意营养搭配的人数仅占2.5%，得出经常吃早餐中注意营养搭配的人数，最后根据每天吃和经常吃早餐的人数中注意营养搭配的人数，即可求出每天吃早餐中注意营养搭配的人数；
（2）根据（1）即可求出b，再用总数减去a，b，d的人数，即可求出c．
（3）先求出每天吃注意营养搭配的早餐的人数所占的百分比，再用学校的师生总数乘以每天吃注意营养搭配的早餐的人数所占的百分比，即可求出答案．

（1）根据题意得：
常不吃早餐的人数占全部统计人数的百分比是：[5/250]×100%=2%，
∵不注意营养搭配的有138人，不注意营养搭配的占60%，
∴每天吃和经常吃早餐的人数是：138÷60%=230，
∵经常吃早餐的人数是230-150=80人，
∵经常吃早餐中注意营养搭配的人数仅占2.5%，
∴经常吃早餐中注意营养搭配的人数是80×2.5%=2，
∵每天吃和经常吃早餐的人数中注意营养搭配的人数是：230×40%=92人，
∴每天吃早餐中注意营养搭配的人数是92-2=90人；

（2）根据（1）得：b=80，
c=250-150-80-5=15；


（3）∵每天吃注意营养搭配的早餐的人数所占的百分比是：[150/250]×[90/150]=36%，
∴学校的3500名师生中遵守科学的早餐方式的有：3500×36%=1260；
故答案为：2%，90．

点评：
本题考点： 条形统计图；用样本估计总体；扇形统计图．

考点点评： 此题主要考查了搜集信息的能力（读图、表），分析问题和解决问题的能力，正确解答本题的关键在于准确读图表．

Don't take breakfast snacks,etc.Into the classroom,isn't in the classroom to eat,jointly maintain clean the classroom environment.

I get up at seven am in the morning and then have my breakfast

have eggs and salad for breakfast

设一级厨师每分钟做x个,二级每分钟y个,每笼有z个
4*10x=4z+32
5*10y=6z-30
10x=10y-5
然后解方程就可以了

解题思路：可以用相同的酒精灯对物质加热，在相同时间内物质吸收的热量相等，用温度计测出物质温度变化关系，然后分析答题；
让质量相同的不同物质加热相同的时间（用相同的加热装置，加热时间就表示了吸收热量的多少），看温度的变化值，温度变化值大的物质吸热能力弱；
将质量相同的不同物质加热到相同的温度，比较加热时间的不同，加热时间长的物质吸热能力强．分析数据进一步得出结论．

（3）用相同的酒精灯对质量与初温相同的牛奶和豆浆加热，在相等时间内它们吸收的热量相等，用温度计测出牛奶与豆浆的温度，然后可以比较两物质的吸热能力大小，除钟表与图示实验器材外，还需要温度计．
（5）由表格中数据知，相同质量的牛奶和豆浆加热相同的时间，即吸收相同的热量，牛奶升高的温度小于豆浆升高的温度，说明牛奶的吸热能力强；因此可得出结论：相同质量的不同物质，升高相同温度，吸热本领强的物质，吸收热量多．
故答案为：（3）温度计；（5）A；相同质量的不同物质，升高相同温度，吸热本领强的物质，吸收热量多．

点评：
本题考点： 探究比热容的实验．

考点点评： 此题考查的是比较物质吸热能力的方法，是一道热学的基础题．比较常见的为探究性实验，要求我们应注重探究实验的过程，运用控制变量法分析问题．

Good morning,everybody!
Today I will talk a story for you,is a very classical story,but before listening my story,please ensure you have eaten the breakfast!
OK!Let's me start talk!
经典故事-classical story

合理膳食指的是由食物中摄取的各种营养素与身体对这些营养素的需要达到平衡，既不缺乏，也不过多．根据平衡膳食宝塔，均衡的摄取五类食物．合理营养还包括合理的用膳制度和合理的烹调方法，烹调时要注意低盐、低脂肪，并少放味精等．每天要一日三餐，定时定量，不挑食，不偏食，早餐吃好，中午吃饱，晚上吃少．每天摄入的总能量中，早、中、晚三餐比例为3：4：3．缺乏某些营养素会引起营养缺乏病．水是构成细胞的主要成分，人体内的营养物质和废物必须溶解在水中才能被运输，可见水的作用很大，要注意补充水分，不能用饮料代替补充水分等，常吃“洋快餐”等煎炸食品会造成脂肪堆积，而其他营养物质缺乏，是一种不健康的饮食习惯．可见D符合题意．
故选：D

What do you have for breakfast?

此话是对理想状态来说的,具体到每个人,要具体情况具体处理,这与中医讲的辨症施医是一个道理,名医开方时对看似相同的病症可以开出完全不同的方子.对小孩子来说也是这样,不能死搬教条.不过话又说回来,如果早上吃的真像皇帝一样,晚上是可以吃得简单些,问题是现在大多数人早上吃点牛奶、鸡蛋、豆浆、面包就以为吃得像皇帝了,实际上还差得远.如果有机会在大饭店吃有几十个品种的自助早餐,那就差不多了,但对大多数家庭来说根本做不到,只好晚餐也吃得像平民一样了.

你的朋友mary来自英国,现在住在北京.她非常喜欢中国的食物,她早餐吃鸡蛋喝粥,午饭吃米饭和肉,晚餐吃水饺.请根据提示写一篇五十词左右的短文,可适当发挥.
My friend Marry is from the UK.She is an English girl.Now,she is staying in Beijing.She love China and Chinese food very much.She usually has eggs and porridge for her breakfast.For Lunch,she like eating rice and meat.In the evening,she eats dumplings.We will go shopping together this Saturday and she will go back to the UK next month.I think I am going to miss her a lot when has gone home.
已替你写她了,.大约超过50个字.

学生不吃早餐的危害 营养专家认为,早餐是一天中最重要的一顿饭,每天吃一顿好的早餐,可使学生的免疫力大大提高,拥有健康的身体.医学专家发出警告：不吃早餐危害巨大.一、不吃早餐,血液黏度就会增高,且流动缓慢,天长日久,会导致学生心脏病的发作.二、不吃早餐,血液就不能保证足够的葡萄糖供应,时间长了就会使学生变得浑身乏力,肝功能受损,甚至出现恶心、呕吐、头昏等现象,无法投入到紧张的学习之中.三、不吃早餐,会使人体必需的第七大营养素——膳食纤维摄取量下降,从而出现便秘现象.四、不吃早餐,会使胆囊内胆汁高度浓缩,胆汁有可能析出结晶、颗粒,甚至形成结石.五、不吃早餐,胃酸会对胃黏膜产生刺激作用,导致胃炎,并形成胃溃疡.

解题思路：淀粉在口腔能进行初步消化，蛋白质在胃内被初步消化，然后进入小肠，在小肠内淀粉被消化为葡萄糖，蛋白质被消化为氨基酸，小肠是消化和吸收的主要场所．

（1）、面包的主要成分是淀粉，因为口腔中有唾液淀粉酶，淀粉在人体的口腔就开始被初步消化了．
（2）、牛奶含丰富的蛋白质，蛋白质的最终消化产物是氨基酸．
（3）、人体消化吸收的主要场所是小肠，小肠很长，其内有皱襞和小肠绒毛，绒毛上有毛细血管，绒毛壁和毛细血管壁都只由一层上皮细胞构成，大大增加了吸收的面积，利于吸收．小肠内有肠腺，能分泌肠液，肝脏分泌的胆汁和胰腺分泌的胰液也流入小肠，能消化食物，因此小肠是消化和吸收的主要场所．
（4）维生素C能够维持正常的新陈代谢，维持骨骼、肌肉和血液的正常生理作用，增强抵抗力，当人体内缺乏维生素C时，人会患坏血病，表现为皮下、牙龈经常出血．
（5）糖类是人体最重要的供能物质，人体的一切活动，包括学习、走路、消化和呼吸等所消耗的能量（约70%）主要来自糖类，脂肪是人体内备用的能源物质，一般储存在皮下备用，蛋白质是构成人体细胞的基本物质，也能提供能量；水、无机盐和维生素不能为人体提供能量．
一名同学长期节食减肥，身体消瘦，他不足的能量将通过分解储存的脂肪来补充．
（6）为了满足人体对能量和各种营养物质的需要，做到合理营养，按“平衡膳食宝塔”均衡摄取五类食物，以避免营养不良和营养过剩；人每天摄入最多的应该是米、面等主食，其次是蔬菜、水果，摄入量最少的是脂肪食品．
早餐可吃：肉丝面、水果、蔬菜．
故答案为：（1）淀粉；口腔；
（2）蛋白质；胃；氨基酸；
（3）小肠；
（4）坏血病；
（5）脂肪；
（6）早餐可吃：肉丝面、水果、蔬菜．

点评：
本题考点： 食物的消化和营养物质的吸收过程；注意合理营养．

考点点评： 理解合理营养的含义，并了解人体需要的营养物质及其消化和吸收等的知识，注意灵活答题．

选第二堆,因为一共有两只小兔子,每只吃2个萝卜,列式：2+2=4个