alexiscollins401 alexiscollins401

16-08-2018
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What contribution did Jonas Salk make to science in the 1950s?
A.
He invented DDT, the “miracle” pesticide.
B.
He designed the first US satellite.
C.
He developed smaller computers.
D.
He created a vaccine against polio.

Respuesta :

amariaaaxo amariaaaxo

21-02-2019

D. He created a vaccine against polio.

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