B(期中·红桥区)
Sirish Subash, a student from the US, won the 3M Young Scientist Challenge. He made a tool that can find pesticides(杀虫剂)on fruit and vegetables. This won him 25,000(about 180,000 yuan)and the title(称号)of "Best Young Scientist in America".
Subash's idea for the tool came from a simple but important question. His mother always told him to wash fruit before eating it. The boy wondered if the action did any good. He learned that 70 percent of fruit and vegetables have pesticides. They can bring possible health problems like cancer(癌症). Washing only washes away part of the pesticides. "If we could find them, we could avoid eating them and lower the risk of those health problems," Subash said.
This led Subash to invent PestiSCAND. It is a small tool that people can take with them. It works by shining lights and seeing how light reflects off food. With the help of a sensor(传感器), a screen and an AI learning model, the tool can find out if there are pesticides on them.
To use it, users must point PestiSCAND at the fruit or vegetable to see if they need to wash it again. They can check the results in an app on their phones. During testing, PestiSCAND was right more than 85 percent of the time in finding pesticides. Subash plans to improve his tool and hopes to get it to market by the time he starts college.
( )31. What is PestiSCAND mainly used for?
A. Analyzing the sweet of food. B. Washing fruit and vegetables.
C. Finding out pesticides on food. D. Growing plants without pesticides.
( )32. What does Subash plan to do with his tool PestiSCAND?
A. To stop producing it. B. To just keep it for his mum.
C. To give it to other scientists. D. To improve and get it to market.
( )33. Put the following events about Subash in the correct order.
a. He invented PestiSCAND. b. He won the 3M Young Scientist Challenge.
c. He learned that lots of fruit have pesticides. d. His mother told him to wash fruit before eating.
A. d-c-a-b B. d-a-c-b C. a-c-b-d D. c-a-b-d
( )34. What can we infer from Subash's story?
A. AI technology is easy to use.
B. Young people can also make great changes.
C. Solving everyday problems needs much money.
D. Washing fruit is completely useless for food safety.
( )35. What is Subash like?
A. Shy and normal. B. Smart and creative.
C. Lazy but outgoing. D. Honest and friendly.

31. C 根据“He made a tool that can find pesticides on fruit and vegetables.”及第三段对PestiSCAND功能的描述可知,该工具主要用于检测食物上的农药。故选C。
32. D 根据“Subash plans to improve his tool and hopes to get it to market by the time he starts college.”可知,Subash计划进一步优化并市场化该发明。故选D。
33. A 根据“He made a tool that can find pesticides on fruit and vegetables. This won him 25,000(about 180,000 yuan) and the title of 'Best Young Scientist in America'.”可知,“他赢得了挑战(b)”是最后发生的;根据“His mother always told him to wash fruit before eating it.”可知,这是事情的起因,“他的妈妈让他吃水果之前要洗一下(d)”排在最前;根据“He learned that 70 percent of fruit and vegetables have pesticides.”可知,然后他了解到很多水果有农药(c);然后他发明了PestiSCAND(a),所以正确顺序是d-c-a-b。故选A。
34. B 根据Subash通过观察生活问题并发明实用工具可知,年轻人也能通过创新改变生活,B项“年轻人也能带来重大改变”符合文章主旨。故选B。
35. B 根据“Subash's idea for the tool came from a simple but important question. His mother always told him to wash fruit before eating it.”, “This led Subash to invent PestiSCAND.”及“Subash plans to improve his tool and hopes to get it to market by the time he starts college.”可知,Subash很聪明且有创造力。故选B。