A
The advancement of human civilization is possible just because of enormous contribution made by scientists. They are one of the most influential people of today’s world. With practical advantages in engineering, medicine, and technology, they have helped us to grow better understanding about the world and different working phenomenon that governs us. Their names are remembered in the sands of time for their work in the welfare of mankind with different inventions that has made our modern lives easy. Here is a list of the four great scientists we’ve ever seen who changed the world.
Louis Pasteur(1822－1895)
Pasteur contributed greatly towards the advancement of medical sciences developing cures for rabies, anthrax and other infectious diseases. He also invented the process of pasteurization(加热杀菌法) to make milk safer to drink. He probably saved more lives than any other person.
Otto Hahn(1879－1968)
Hahn was a German chemist who discovered nuclear fission(裂变) in 1939. He was a pioneering scientist in the field of radiochemistry, and discovered radioactive elements in 1921. He was awarded the Nobel Prize for Chemistry in 1944.
Nikola Tesla(1856－1943)
Tesla worked on electromagnetism and AC current. He obtained around 300 patents worldwide for his inventions from electricity to radio transmission, but many inventions developed by Tesla were not put into patent protection. He played a key role in the development of modern electricity.
James Clerk Maxwell(1831－1879)
Maxwell made great progress in understanding electromagnetism. His research in electricity and kinetics laid the foundation for quantum(量子) physics. Einstein said of Maxwell，“The work of James Clerk Maxwell changed the world forever.”
【解题导语】 本文介绍了四位伟人， 四个人都是社会的重要贡献者， 为社会变革做出了巨大的贡献。
21．What contribution did Louis Pasteur make to society?
A．The development of medicine.
B．Radiochemistry.
C．Modern electricity.
D．Quantum physics.
A 解析：细节理解题。根据“Pasteur contributed greatly towards the advancement of medical sciences developing cures for rabies, anthrax and other infectious diseases.”可知， Louis Pasteur 促进了医学的发展。所以A选项是正确的。
22．Who was thought highly of by Einstein?
A．Louis Pasteur.
B．Otto Hahn.
C．Nikola Tesla.
D．James Clerk Maxwell.
D 解析：细节理解题。根据“Einstein said of Maxwell, ‘The work of James Clerk Maxwell changed the world forever.’”可知， 爱因斯坦对James Clerk Maxwell的评价很高。所以D选项是正确的。
23．What can we infer about the four people?
A．They are medical pioneers.
B．They are Nobel Prize winners.
C．They are great contributors to society.
D．They are founders of modern physics.
C 解析：推理判断题。根据文章内容可知， 他们四个人都是社会的重要贡献者， 为社会变革做出了巨大的贡献。所以C选项是正确的。
