Answer:In 1947, Salk took a position at University of Pittsburgh, where he began conducting research on polio, also known as infantile paralysis. By 1951, Salk had determined that there were three distinct types of polio viruses and was able to develop a "killed virus" vaccine for the disease.
Explanation:
Answer:
B. They wrote travel brochures.
Explanation:
Our first president was George Washington! :)
Answer;
<span>Samuel Adams and Thomas Jefferson are alike in their position on ratifying the Constitution in that;
</span><span>-They both opposed a strong federal government.
Explanation;
Sam Adams helped formulate resistance to the Stamp Act and played a vital role in organizing the Boston Tea Party. Sam Adams opposed a strong federal government,
Thomas Jefferson </span>regarded the people as the ultimate defenders of liberty. Distrust of power, especially power concentrated in a central government, was central to his political views. <span>Among the constitutional measures which he supported in order to avoid concentration of power were federalism and the separation of powers</span>
