1. the poincaré conjecture.
in 2002, the russian mathematician grigori perelman proved the poincaré conjecture. this is a very serious discovery in mathematics. it was one of the seven tasks of the millennium. for this work, he received the prestigious fields medal, an analogue of the nobel prize in mathematics.
2. quantum clock.
quantum clocks are the most accurate chronometer in the world, surpassing all previously existing ones. nobel laureates of 2012 serge arosh and david wineland made a discovery that allowed to overcome the quantum barrier.
3. the discovery of eris.
the eris is the second after the massive pluto massive dwarf planet of the solar system. it was the discovery of eris from pluto that ceased to be the ninth planet, and passed into the category of "dwarf".
4. created the first synthetic bacterial cell.
in 2010, scientists from the craig venter institute created the first fully synthetic chromosome with the genome. when it was embedded in a bacterial cell devoid of genetic material, it began to function and divide according to the laws prescribed by the new genome.
5. higgs boson.
this was experimental evidence of the existence of the higgs boson. the practical significance of the discovery of the higgs boson is that scientists are opening up prospects for the development of anti-gravity and the development of engines that do not require energy to operate.
Learning a foreign language is not easy. It is a long and slow process that requires a lot of time and effort. Nowadays it is especially important to know foreign languages. ..some people learn languages because they need them for work, others go abroad, for others, learning languages is a hobby. ..everyone who knows foreign languages can communicate with people from other countries, read foreign writers in the original, which broadens their horizons. It is not surprising that many intellectuals and educated people are polyglots. I am learning English. ..nowadays English has become the most important language in politics, science, trade and cultural relations. More than 300 million people speak it as their first language. ..native English speakers live in the UK, United States of America, Australia and New Zealand. English is one of the official languages in the Republic of Ireland, Canada, and the Republic of South Africa. ..English is one of the official languages of the United Nations and other political organizations. Half of the world's scientific literature is written in English. It is the language of computer technology. ..to know English today is absolutely necessary for every educated person, every good specialist. English is a wonderful language. This is the language of great literature. ..it is the language of William Shakespeare, Jonathan Swift, Walter Scott, Charles Dickens. The great German poet Goethe once said: "He who does not know a foreign language does not know his own." ..therefore, to understand yourself and the environment, you need to learn foreign languages. 2. ask a few questions
Удачи!
A-4
B-1
C-2
D-6
E-5
Объяснение: