魔女在彼岸
The United States belong to North America, mainly include three parts of mainland, Alaska and Hawaii, the area amounts to ten million meters of squares of 930 remainings, residing the fourth in the world, total population about 270,000,000, reside the 3 in the world, but the United States can be divided into 56 states again, among them woulding be Alaska biggestly.The United States is the most economic flourishing one of the nation in the world, being the superpower of it still have the military real strenght of the male , but, this also come to a decision its hegemonism route, recent gulf war, Afghanistan war and Iraqi wars all have something to do with it. The American capital city is Washington, but the economic center is in New York, the main city contain New York, Los Angeles, Chicago,Houston , Washington, Seattle, Hawaii etc.. An American friend has invited you to visit his family. You’ve never been to an American’s home before, and you’re not sure what to do. Should you take a gift? How should you dress? What time should you arrive? What should you do when you get there? Glad you asked. When you’re the guest, you should just make yourself at home. That’s what hospitality is all about: making people feel at home when they’re notThe question of whether or not to bring a gift often makes guests squirm. Giving your host a gift is not just a social nicety in some cultures-it’s expected. But in American culture, a guest is not obligated to bring a present. Of course, some people do bring a small token of appreciation to their host. Appropriate gifts for general occasions might be flowers, candy or-if the family has small children-toys. If you choose not to bring a gift, don’t worry. No one will even notice.American hospitality begins at home-especially when it involves food. Most Americans agree that good home cooking beats restaurant food any day. When invited for a meal, you might ask, "Can I bring anything?" Unless it’s a potluck, where everyone brings a dish, the host will probably respond, "No, just yourself." For most informal dinners, you should wear comfortable, casual clothes. Plan to arrive on time, or else call to inform your hosts of the delay. During the dinner conversation, it’s customary to compliment the hostess on the wonderful meal. Of course, the biggest compliment is to eat lots of food! When you’ve had plenty, you might offer to clear the table or wash the dishes. But since you’re the guest, your hosts may not let you. Instead, they may invite everyone to move to the living room for dessert with tea or coffee. After an hour or so of general chit-chat, it’s probably time to head for the door. You don’t want to wear out your welcome. And above all, don’t go snooping around the house. It’s more polite to wait for the host to offer you a guided tour. But except forAmericans usually like to have advance notice when people come to see them. Only very close friends drop by unannounced. This is especially true if the guests want to stay for a few days. Here’s a good rule of thumb for house guests: Short stays are best. As one 19th century French writer put it, "The first day a man is a guest, the second a burden, the third a pest." Even relatives don’t usually stay for several weeks at a time. While you’re staying with an American family, try to keep your living area neat and tidy. Your host family will appreciate your consideration. And they may even invite you back! Most Americans consider themselves hospitable people. Folks in the southern United States, in particular, take pride in entertaining guests. In fact, "southern hospitality" has become legendary. But in all parts of America, people welcome their guests with open arms. So don’t be surprised to find the welcome mat out for you. Just don’t forget to wipe your feet. Statue of Liberty, Barbie, "the United States Gothic," Buffalo nickel and Uncle Sam called five major symbol of American culture. Since the Statue of Liberty in New York in 1886 to stand firm in the Bay, it has been the arrival of the new immigrants the promise of the American Dream. The statue is a French artist from the United States to celebrate the independence of the US law designed Union, said the arms came from the beautiful statue of the artist's wife, and the vicissitudes resolute face is drawn from the artist's mother. Queen Barbie doll is almost all girls, and even the adult female dolls preference. Barbie was the inspiration for the creation of a United States handler toy company co-founder's daughter and his wife Barbara, their adult with a German on the basis of sexy doll in 1959 launched a decent authentic American Barbie doll. It is ironic that the couple's daughter handler favorite Barbie, but they hate the son of ken have it. "American Gothic" might not be well known, but the portrait of the Old House Gothic windows, especially solemn expressions that do, and that the long neck to the wife of the artist famous night in 1930. The paintings performance of the United States farmers solemn pride. Buffalo nickel in the 1913-1938 issue, the famous artists james earle fraser development of the western region of the victims of the United States - to commemorate the buffalo and Indians. Nickel on the bison and the Indians have a real prototype creation. Uncle Sam - Americans alias, is a big high, white hair, leaving a handful of white beard, wearing a dark blue jacket, the head of the stars embellished Gaomao image. Independent in the United States during the revolutionary period, a sam wilson is the honest and hardworking young people responsible for the supply of meat to the United States military, after testing the meat to the printed on the ea-sa markings ea representatives meat company name, origin us on behalf of the United States. Later, the company was one of us staff deliberately translated into Uncle Sam; Since then, Uncle Sam's name on the soldiers in a spread. In a war, and during World War II, artists montgomery flagg their image in the painting as Uncle Sam recruitment poster, Uncle Sam's access to a lasting image from the position. Statue of Liberty presented from the United Kingdom, the United States, it represents the beliefs of "freedom" Barbie is the origin of Hollywood, no long history of the United States, in the cultural conquest of the few others, and Barbie do well, it is consistent with the Americans conquer connotation. As for the Gothic, I have it understood as architectural style, and the United States Gothic not clear. Buffalo nickel to commemorate the historical development of the western region, the entire United States is now the most affluent areas. Uncle Sam is not to mention, it was a period from the foundation of war in Washington. "Soil and water support one side", "shaping the environment" when an "environment" After long and the same time have become a tradition, humanity has been to "create" and has been accepted.希望对你有帮助，O(∩_∩)O谢谢！
嘟嘟和滴滴
美国在世界上最先进的科技有导弹、隐形战斗机、航母技术最发达、空天飞机、研制中的电磁轨道炮和电磁弹射的福特号航母 等等诸多科技。
1.技术创新
硅谷成功地抓住了20世纪50年代以来世界信息产业四次技术浪潮的机遇，稳居IT业潮头。第一次是20世纪50年代，惠普等公司借美国国防工业对电子产品的大量需求的东风，促进了企业的快速扩展，建立了硅谷的技术基础设施和支持行业。第二次是1959年集成电路的发明，导致了20世纪六七十年代半导体工业的急剧增长。快捷、英特尔、AMD和国家半导体公司等著名企业就是在这个阶段出现的。第三次是20世纪70年代中期以来，个人计算机的产业化发展，硅谷又走在前面，涌现出苹果电脑等20家计算机公司以及更为复杂的以太阳微系统等公司为主导的工作站产业。第四次是互联网。1993年互联网的商业发展和万维网的创立，为硅谷开辟了新的发展前景，网景公司、思科公司和3com公司已成为互联网革命的领导者。同时，20世纪90年代以来，随着生物技术的突破，生物科技产业已成为新的高科技产业热点，硅谷又以其特有的敏感性和优势吸纳了生物科技企业在此落户。到1998年，硅谷的生物技术市场资本总额已居全美第一位。
2.创业企业家、创业精神和创业企业
硅谷的实力建立在高新技术基础上，但是这里没有囊括全部的高科技成果，就连IT业中的国际互联网技术也是在别的地区率先突破的。因此，硅谷的与众不同之处并不仅仅在于高新技术。这里汇聚的创业企业家、创业精神和创业企业同样发挥着至关重要的作用。硅谷成功的企业家中除了才华和能力外，还有一个共同的特点，就是具有昂扬的创业精神和在第一时间将新产品、新工艺、新方法引入产业化生产、引入市场的勇气。惠普、苹果、雅虎等企业均是由两个白手起家的年轻人创建的，这些例子并不是巧合。创业企业家们不仅具有高科技的背景，而且有通过创建企业向全世界推广新技术的强烈愿望，对他们来说，创建企业的过程以及与整个世界共享新技术成就的远景才是创业的真正理想所在。此外，创业企业结构灵活、前景远大、回报率高、主体意识强等特点也进一步激发了企业家们不拘一格的创新意识。创业企业家聪明才智与创业精神的有机结合，是造就硅谷辉煌的决定因素。
3.鼓励创新的制度环境
美国有一套全国性的法律以及证券、税收、会计、公司治理、破产、移民和研发等规范。它们是分权和分散的，但是又有紧密的联系和很强的互补性。这个体制以市场为导向，鼓励竞争，特别是鼓励创新企业。比如，在欧洲建立一家公司平均所耗时间是在美国所需时间的12倍，而且成本高3倍。同时，与绝大多数国家相反，美国根据反垄断法，一直约束着市场上的大公司，比如在计算机行业对IBM和微软的约束。此外，政府还通过制定公司运营规则、购买公司产品、资助研发经费等形式推动了以硅谷为代表的计算机产业发展。最后应该指出的是，尽管美国一直标榜贸易自由，但是在20世纪80年代中期仍是通过向日本施压以保持美国半导体在日本市场的份额。
4.专业化的创新支持系统
在硅谷，为新的高技术企业提供的支持服务应有尽有，包括风险投资家、银行家、律师、猎头公司、会计师、咨询顾问以及大量其他专业人员。其中风险投资业发挥着举足轻重的作用。高技术企业不同于拥有许多真实资产的传统企业，它的主要资产是创意、人力资源、技术与市场知识，更具有风险性。同时，由于高技术的飞速发展，时间对于创业企业抢占产业制高点尤为重要。硅谷成功的一个重要条件就是有一个了解技术并知道如何进行结构化交易和投资组合、为创业企业提供快速融资的风险资本行业。思科公司、基因技术公司、英特尔、太阳微系统公司以及雅虎等成功企业都是在风险资本的支持下快速成长起来的。风险资本也从成功的高技术企业中赢得了巨额回报。1998年，硅谷的信息技术和生命科学两个主要产业中共有1824家企业吸纳了125亿美元的风险投资。
凹凸威小姐
很多很多，导弹很先进，隐形战斗机就他有，航母技术最发达，已经研制出空天飞机，还有研制中的电磁轨道炮和电磁弹射的福特号航母 当然我举的是军事方面的，在其他各方面领域，几乎都是世界最先进的诺贝尔奖有一半以上获奖者是美国人。美国科学家待遇好，氛围好。主要是美国大学教育非常好，世界顶级。培养了大批人才。反观中国，唉
