B．separated two radioactive elements alone

　　C．made contributions to the study of X­rays

　　D．won the Nobel Prize twice with her husband

　　解析：选C　细节理解题。由第二段中的"this work laid the foundation for X­rays and atomic physics"可知，玛丽·居里的工作为研究X射线和原子物理奠定了基础。

　　2．What can we learn about Rachel Carson?

　　A．She was a physicist and chemist.

　　B．Her books had a great influence on the public.

　　C．She was inspired by her father to become a scientist.

　　D．Her role as an environmentalist was rarely known by people.

　　解析：选B　细节理解题。由倒数第二段中的"her book The Sea Around Us made scientific knowledge about the sea ... a book that helped lead to improvements in the use of chemical pesticides (农药)"可知，雷切尔·卡逊所著的两本书对大众都产生了很大的影响。

　　3．What can we infer about the author?

　　A．She aims to become a scientist.

　　B．She likes reading and writing stories.

　　C．She has a great interest in women scientists.

　　D．She wants to publish articles in the magazine.

　　解析：选C　推理判断题。由最后一段中的"I believe that we need to encourage young women to enter the field of science"可知，作者对女性科学家的故事很感兴趣。

　　B

　　Louis Pasteur was a world­famous French chemist and biologist.

　　He is particularly famous for his work on rabies vaccine (狂犬病疫苗). The rabies virus enters the body through the bite of an infected animal or through infected saliva entering an existing wound. After experimenting with the saliva of animals suffering from the disease, Pasteur concluded that the disease rests in the central nervous system of the body. By studying the tissues of infected animals - rabbits, Pasteur was able to produce a form of the virus. This could be used for inoculation (接种)．

　　On July 6, 1885, Pasteur tested his pioneering rabies vaccine on a man for the first time. He saved the life of a young man called Joseph Meister who had been bitten by a rabid dog. Pasteur was urged to treat him with his new method. The treatment lasted 10 days and at the end he recovered and remained healthy. Since then thousands have been saved by this treatment.

On March 1886, Pasteur was invited to present his results to the Academy of Sciences and in 1888 went on to found the Pasteur Institute in Paris. This was a pioneering clinic for the study of infectious diseases, the treatment of rabies and a centre for teaching. Pasteur directed the institute personally until he died. The Pasteur Institute is still one of the most important centres in