阅读下列短文，从每题所给的四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
A
Women scientists around the world have made significant contributions to Stem (science, technology, engineering, and maths). Here are four who pushed boundaries and changed the world.
Wu Chienshiung (1912—1997)
Born in Taicang, Jiangsu province, Wu took part in the Manhattan Project which helped create the world’s first nuclear weapon. Her famous Wu experiment overturned the theory of parity in physics. This breakthrough led to a Nobel Prize that was awarded to her male colleagues, but Wu’s critical role in the work was overlooked.
Hedy Lamarr (1914—2000)
Austria-born Lamarr starred in a lot of Hollywood films and made great success. She was also super smart and a self-taught inventor. During the second world war, Lamarr together with George Antheil, a composer, developed a radio guidance system. The principle of their work is part of the basis of Bluetooth and wireless technology.
Katherine Johns (1918—2020)
African American NASA mathematician Johnson’s calculations were critical in getting the first US astronauts to space and back safely. During her 33-year career at NASA, Katherine earned a reputation for mastering complex calculations and was referred to as a “human computer”.
Tu Youyou (1930—)
Born in Ningbo, Zhejiang province, Tu shared the 2015 Nobel Prize in Physiology or Medicine with two other foreign scientists, for her work in discovering artemisinin, a drug used to treat malaria. Her work has saved millions of lives all over the world. Tu is the first Chinese Nobel winner in physiology or medicine and the first female citizen of the PRC to win a Nobel Prize.
21．Besides being an inventor, Hedy Lamarr is also a(n) ________.
A. composer B. producer C. actress D. mathematician
22．What is Tu Youyou’s greatest contribution to the world?
A. She treated people for cancer. B. She is the first Chinese Nobel winner.
C. Her discovery helped save millions. D. Her research project is one of a kind.
23．What do the four female scientists have in common according to the text?
A. They shared the same interest. B. They each constructed a theory.
C. They were all awarded the Nobel Prize. D. They all made a difference to the world.
