题目

阅读理解 17-year-old Dasia Taylor was named one of 40 finalists in the Regeneron Science Talent Search (STS), the nation's most famous Science and math competition for high school seniors. Dasia's sutures (缝合线) work by changing color if the patients' pH level changes, indicating an infection. pH is one of the most common parts of wound healing, Dasia said. It changes very quickly, so it's one of the fastest ways to recognize infection. So, she started experimenting with root vegetables. "I found that beet changed color at the perfect pH point," says Taylor. "That's perfect for an infected wound. And so, I was like, 'Oh, okay. So beet is where it's at'." Beet provided the perfect dye for her invention, changing from bright red to dark purple when a surgical wound becomes infected. After more than a year of research, Taylor is working on getting her sutures patented. She imagines these sutures being used in developing countries where they can save lives and money. "The goal of my project is to reduce the number of deadly surgical site infections in developing countries because developing countries suffer from the most number of deaths due to surgical site infections," she said. "I was like there is no way that that should be happening. The equity part of my brain and all the work that I do around equity was like 'That shouldn't be happening. They should have the resources to save their citizens in their country.' So, my goal is to work on that and make sure that it can actually discover those types of infections and stuff." After graduation, Dasia hopes to attend Howard University, study political science and finally become a lawyer. （1） How can a patient quickly know if a wound is infected? A . By observing the pH test paper. B . Through the doctors' examination. C . By looking at sutures' color changing. D . By observing how the wound changes. （2） What did Dasia discover in her experiment? A . Beet has the same pH level. B . Beet can change color at different times. C . Beet therapy is good for wound healing. D . Beet can be used to help her with the invention. （3） What can we learn about Dasia? A . She has won the invention patent. B . She became the winner of the Regeneron STS. C . She made contributions to surgical infection recognition. D . She helped save lots of lives and money in developing countries. （4） What will Dasia's future career probably involve? A . Medical and health work. B . Medical device development.    C . Something about the legal aid. D . Medical and science research. 答案： C D C C

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