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Female Scientists Who Have Changed the World
There are still hundreds of relatively-unknown women who have changed the world with their research throughout history .
Tiera Guinn
This 21-year-old scientist hasn't yet graduated from college, but Tiers Guinn's already doing rocket science. The MIT（麻省理工学院）senior is helping build a rocket for the United States that could be one of the biggest and most powerful ever made. She's an aerospace major with high credit points who also works as a Rocket Structural Design and Analysis Engineer for the Space Launch System that aerospace company Boeing is building for the US.
Elizabeth Blackwell
Elizabeth Blackwell, who was born in Bristol, England in 1821 ,was the first woman to graduate from medical school in the United States, became an activist for poor American women's health, and went on to found a medical school for women in England.
Jane Goodall
The most famous primate （灵长目）scientist in history, Jane Goodall was known for her work with chimps and as a champion of animal rights. And Goodall wasn't just working in a lab；she climbed trees and imitated the behavior of chimps in Tanzania to gain their trust and study them in their natural habitat.
Rachel Carson
In the 1960s,one environmental scientist's voice rose above the rest to become central to American politics,culture,and foreign policy：Rachel Carson's. Her article, "Silent Spring," warned of the dangers of pesticide（农药）and chemicals to humans, plants, and animals, and was a landmark in the nation's environmental history.
21. What is Tiera Guinn's greatest achievement?
A.She entered the best university of the world.
B. She has helped build a big and powerful rocket.
C. She has been learning the newest rocket science.
D. She is a top student employed by a famous company.
22. What is Elizabeth Blackwell famous for in history?
A. She was the first woman with the advanced education.
B. She founded the first women's school in the United Kingdom.
C. She was a pioneer of the women's health in the US and the UK.
D. She was the first woman to be accepted as an American citizen.
23. Who made a great contribution to the animal-protection movement?
A. Tiera Guinn. B. Elizabeth Blackwell. C. Rachel Carson D. Jane Goodall.
