USA,United States ,Ameria三个词有什么不一样在写句子时,这三个词有什么不同吗,可以说I am come from USA吗

USA,United States,America哪个前面要加the? The letters USA stand for the United States of American. the united of states 的缩写是the USA还是USA Another way of saying the United States is ____ or the United States of _____.A.American;American B.America;america C.a U.S.;the U.S.D.a USA;the U.S.还要说出为什么, 美国人最习惯怎样称呼美国?是 the USA?the US?America?the United States?the United States of America? The USA is the short from of the United States of America.The United States of America is the full name of the USA. the united states is a d---- country A _____ are form the United States 美国英文单词的缩写到底是USA还是the USA?the United States of America 表示美国,那么一般用USA还是the USA来表示美国呢? the letter USA (代表)the United States of America.那个代表是一个单词. 为什么 USA,America,the United States 都可以是美国的意思 请问,美国的正常翻译到底是什么,USA?United States or american a Coke/a coke,a Walkman/a walkman,USA US America the United States这三组词的区别是什么?一定有区别,不仅是美式英语和英式英语的区别! United States of America United States of united states是什么意思 United states怎么读 from united states是什么意思