Jonas Salk<span> </span><span>was an American </span>medical researcher<span> and </span>virologist<span>. He discovered and developed one of the first successful </span>polio vaccines in the 1950's.
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Many people outside Mexico mistakenly believe that Cinco de Mayo is a celebration of Mexican independence, which was declared more than 50 years<span> before the Battle of Puebla.</span>
The correct answer is - D. Australia is a modern, independent country, but it still has a few ties with Great Britain.
Australia is a country that has been established by Great Britain. It has been settled initially by British people in the colonization period, and the country has been set on the cultural foundations of Great Britain.
That has led to a good development of the country since it has been established, and it has always kept the pace with Great Britain and the other Western countries. Because of that, Australia quickly developed into an independent, modern, strong country, similar in many ways to its founder country.
Despite being independent country and very far away from Great Britain, Australia has always kept good and close ties with the country that made it what it is.
1=D
2=B
3=D
4=C
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Monopolies and political machines
