答案　D

　　3．Which of the following shows the path of the signals described in Paragraph 5?

　　解析　细节理解题。由第五段前三句可知选C。

　　答案　C

　　4．The team will test with real patients to________.

　　A．make profits from them

　　B．prove the technology useful to them

　　C．make them live longer

　　D．learn about their physical condition

　　解析　细节理解题。

　　由最后一段中的One is testing with real patients, so as to prove that this is a technology they can benefit from.可知选B。

　　答案　B

　　B

　　Leo Baekeland never gave up his dream of creating a special kind of plastic that

　　would keep its form after it cooled. His invention was Bakelite，an inexpensive，widely used plastic.

　　Leo was born in Belgium into a lower, middle­class family. He studied at the University of Ghent in 1882 and eventually graduated with a doctorate in natural science at the age of 21. He taught there for several years before he traveled on a scholarship to the United States. Once in New York, Leo met Richard Anthony. Anthony saw potential in young Leo and offered him a job of working in America as a chemist for his company. Leo worked for Anthony for the next two years before unsuccessfully attempting to start his own consulting business.

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