Who developed the first effective vaccine against polio?
a. jonas salk
b. n...
History, 11.11.2019 11:31 joshnorman0369
Who developed the first effective vaccine against polio?
a. jonas salk
b. norman borlaug
c. vladimir zworykin
d. marshall mcluhan
Answers: 1
History, 22.06.2019 02:30, zoeyandblaze
Which is guaranteed by the fifth amendment? o a person will have a speedy trial. or a person can refuse to testify against himself or herself. a person can not be forced to testify against his or her spouse. a person has the right to a trial by jury
Answers: 1
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