Jonas Salk was an important American medical researcher and virologist, who is mostly known for developing the first successful polio vaccine in 1955.
-Gvcci
The reason why the Crusaders were so successful in the first Crusade was that the Turks were already weak from fighting themselves - B.
Contrary to common thought, at the times there was no single unified muslim resistance that was fighting the Crausaders, at least in the beginning. There were a lot of fractions that were fighting between themselves and against the Crusaders.
Answer:
government, job specialization
What is your textbook called so I can look it up and help you with the answer.
The product is the answer
