答案就是：能战胜美国的唯一的一个国家。 那就是美国自己
In the vast universe, the earth is insignificant, but in the history of human beings for thousands of years, there is a country that is unbelievable, it is both a promoter of civilization progress, and a pioneer in the field of science and technology, on the long history it is only two hundred years, on the population size is only 300 million, both are far from other ancient civilizations, but such a country, for more than a hundred years, let human civilization stride forward, is the leader of science and technology, but also the creator of science and technology, to this day, has been leading the progress of science and technology, To become the only superpower in the world, it is the United States.
Today we will not talk about hegemonism, let alone military science and technology, let's first talk about the origin of the United States as a country:
Most people who have read history will know that some of America's founding history is not glorious. At that time, the British found the American continent and almost killed the Indians in order to occupy the territory of the Americas. 今天的美国人其实就是英国人，虽然美国的手上沾满了鲜血，但是短短2百年，就能有如此成就，站在世界之巅，其原因值得深思。
Americans are unique in the progress of mankind, and today, we take stock of what Americans have created and benefited mankind:
The first place: electric lights
In 1879, electric lights first appeared in New Jersey, USA, where Edison's laboratory was located, and since then, one block after another has been illuminated by electric lights, and Edison's invention has illuminated the whole world. 人类用这盏灯照亮了心灵，更温暖了灵魂。
第二位：飞机
In 1903, in North Carolina, the White brothers' plane flew over the field for only 12 seconds, which was a major leap in the history of human science. 是这对来自美国俄亥俄州的兄弟缩短了世界各地的距离，这是跨越时空的伟大成就。
Third place: the atomic bomb
In 1945, the first atomic bomb was tested in New Mexico, USA, and its explosive impact cannot be underestimated. In addition to the "military value" of the atomic bomb, the Manhattan Project was a concentrated embodiment of the "melting pot culture" of the United States, many of the scientists involved in the research were new immigrants, and some of them came to the United States to escape the persecution of the German Third Reich. 当然德国科学家居功至伟。
Fourth place: moon landing
我们中国古代嫦娥奔月的神话故事，家喻户晓，但美国人的登月行动才真正让整个世界都“异想天开”。 During the Eisenhower administration in the '60s, the Apollo program was launched and sent Americans to the moon for the first time in 1969. 这是人类的第一次登上外面的星球，才使得人类不至于坐井观天。
Fifth place: laser technology
Lasers are widely used and have great commercial value, and are one of the great inventions of the United States in the 20th century. Einstein outlined the properties of lasers as early as 1917, but it was not until 1960 that scientists at Hughes' laboratory in the United States first demonstrated the phenomenon of lasers. Today, whenever we listen to a CD or watch a DVD, we are making use of lasers; Lasers are also used in eye surgery, barcode scanning, and even rock concert lighting.
Sixth place: the Internet
Many people have contributed to the invention of the Internet. As early as the 60s of the last century, this technology began to be used, but only within the higher education institutions in the United States. The U.S. Department of Defense has built a network called ARPAnet, but there are only 4 nodes, distributed in 4 mainframe computers at UCLA, UC Santa Barbara, Stanford University, and the University of Utah. In 1971, scientists sent their first email through the network.
7th place: magnetic resonance imaging technology
Thanks to magnetic resonance imaging, countless lives have been saved. This painless, non-invasive medical examination allows doctors to see every detail of the patient's body at a glance. The idea of using MRI for medical treatment was first proposed by American scientist Raymond Damandian, and the first MRI machine was put into use in 1977.
Eighth place: communication satellites
In 1958, the world's first communications satellite, built and launched by the U.S. military, sent President Dwight Dwighthorn's message back to Earth: "The miracle of scientific progress has enabled my voice to reach your ears through satellites in space." ”
9th place: transistors
Without the advent of transistors, there would be no so-called "electronic age". These semiconductor components are used in almost all electronic devices such as televisions and computers. The 3-terminal transistor was developed by a team of three scientists who also won the Nobel Prize in 1956 for their contributions.
以上这些绝对算是能够造福人类，伟大的发明，因为我们每一个地球人都得了好处，所以我想每一个人都应该认可的，其实美国这个国家最大的优势就是体制优势，美国人制定独立宣言，也是美国的镇国之宝，三权分立，即互相配合又互相监督。 It has become a truly independent and democratic country with inviolable individual rights.
So the United States can be at the forefront, a big way ahead of other countries, so today it seems that who else can say victory over the United States besides the United States?
But the United States is also a person, not a god, the relative laws of nature can not escape anyone, although the United States is currently the only hegemon in the world, the position is solid, but the political environment within the United States is changing, whether it is the presidential election, or internal confrontation, the United States this giant also has its dead hole, maybe one day from the internal contradiction outbreak, self-disintegration, not impossible, but blessing or curse, no one knows. Yin and yang change, prosperity and decline, the ancient saying of China, do you not know that it is suitable for the United States? You can discuss it together.