题目内容
ICMP是Internet：控制协议报文协议，它允许主机或路由器报告 (1) 和提供有关异常情况的报告。它是 (2) 的组成部分，其报文格式包括报文头和数据区两部分，其中报文头部分是由 (3) 等三个字段组成，每个字段长度分别为 (4) 。ICMP可作为询问报文，用来测试目的站是否可达以及了解其有关状态。常用 (5) 命令来进行这种测试。
查看答案
搜索结果不匹配？点我反馈
更多问题
Ann Curry is a famous news presenter of the NBC News "Today" show. When she was 15 she happened to walk into a bookstore in her hometown and began looking at the books on the shelves. The man behind the counter, Mac McCarley, asked if she’d like a job. She needed to start saving for college, so she said yes.Ann worked after school and during summer vacations, and the job helped pay for her first year of college. During college she would do many other jobs: she served coffee in the student union, was a hotel maid and even made maps for the US Forest Service. But selling books was one of the most satisfying jobs.One day a woman came into the bookstore and asked Ann for books on cancer(癌症). The woman seemed anxious. Ann showed her practically everything they had and found other books they could order. The woman left the store less worried, and Ann has always remembered the pride she felt in having helped her customer.Years later, as a television reporter in Los Angeles, Ann heard about a child who was born with problems with his fingers and his hand. His family could not afford a surgical(外科的) operation, and the boy lived in shame, hiding his hand in his pocket all the time.Ann persuaded her boss to let her do the story. After the story was broadcast, a doctor and a nurse called, offering to perform the surgical operation for free.Ann visited the boy in the recovery room after the operation. The first thing he did was to hold up his repaired hand and say, "Thank you. " What a sweet sense of satisfaction Ann Curry felt!At McCarley’s bookstore, Ann always sensed she was working for the customers, not the store. Today it’s the same. NBC News pays her, but she feels as if she works for the people who watch the programmes, helping them make sense of the world. What particularly gives her the feeling of pride().
M: Hello, may I speak to Mr ParkW: I am sorry. Mr Park has gone to business. Mr Brown and Mr William are taking over his work during this time. You can speak to them. Who does the man want to speak to().
You’re standing in the kitchen and a voice says, "Add a little more salt to that soup." Yes, it’s always nice to have someone help you when you’re cooking. But this voice is not from a man. You are alone! Then where does it come from Is it from a ghost No, this isn’t a ghost kitchen -- it’s the kitchen of the future.Scientists are working to improve everything in the kitchen, from fridges to tables, and even the way we cook. They are making a system. It will help a person cook a meal. You do not need cookbooks. You can hear how to cook food.The fridge of the smart kitchen has a scanner. It looks at the foods in the fridge. It will order more milk from the store when your milk has gone bad or there is no more in the fridge. The gloves will test the temperature of everything they touch and say, "Need to cook longer" or "Hot and ready to eat". If you leave them on the stove by mistake, you’ll hear they say, "Fire!" Even the knives and spoons will speak. For example, if you food is had, the knives and spoons will tell you not to eat it.The future may look wonderful, but it’s not cheap. The multimedia fridge costs about 8 000 dollars. So even though high-tech kitchens are no longer a dream, not everyone can afford it. The fridge of the smart kitchen has a scanner and it ().
今年夏天王女士带着女儿来到某室内游泳馆游泳，1天后，女儿的眼睛出现了剧烈的异物感、眼痛、怕光流泪及结膜下出血，出血多为斑点或片状，色鲜红。1周左右充血自行吸收。 《游泳场所卫生标准》(GB9668-1996)中规定人工游泳池内水的pH值应在
微信支付 
支付宝支付