(2019·石家莊市重點高中高三畢業班摸底考試)WhenGitanjaliRaosharedhowshelik...

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(2019·石家莊市重點高中高三畢業班摸底考試)When Gitanjali Rao shared how she likes “finding solutions to real problems”， it was hard to imagine this dynamic girl could settle a problem that had escaped scientists for years.

In just three months, Rao came up with a device (裝置) that can replace the costly and lengthy tests currently used to reliably determine lead levels in our fresh water. Inspired by the current litigation (訴訟) in Flint, Michigan, a case of water pollution from 2014 until present, Rao designed a new testing system that resulted in her being named “America's top young scientist” for 2017.

Rao had been following the water problem for about two years. She was amazed by the number of people affected by lead pollution in water and wanted to do something to change this. Rao spent months trying to convince local high schools and colleges to give her lab time to continue her experiment. At home, Rao worked on her project in the “science room” she asked her parents to create for her. Rao has created a device that uses three parts: a cartridge, a Bluetooth reader and an app. To put it simply, the cartridge contains carbon nanotubes (奈米管) that react to lead. This reaction is then registered by the Bluetooth reader, which sends a signal to a mobile app that can tell you immediately if your water is safe to drink.

Rao appropriately named the device Tethys and is hoping to make a little improvement to get the device on the market. While we may not be aware of any lead pollution present in our aging pipelines, lead poisoning can cause delays in physical and mental development. With Rao believing that the “purpose of science is to make a difference”， her incredible invention could make a difference to millions of people in the United States.

篇章導讀：本文是一篇說明文。文章主要介紹了一個女孩發明了一款可以檢測水中鉛水平的裝置，從而解決了一個科學家多年來忽視的問題。

5．What do we know about Rao's device?

A．It's cheap and quick.

B．It's cheap and inaccurate.

C．It's expensive and reliable.

D．It's portable and time­consuming.

6．What made Rao have the idea of designing the device?

A．Her parents' suggestions.

B．Her desire for winning the award.

C．Her interest in settling real problems.

D．The water pollution litigation in Flint.

7．What do the carbon nanotubes function as?

A．Sending immediate signals.

B．Detecting the presence of lead.

C．Recording the reaction results.

D．Showing the water quality results.

8．What does the author think of Rao's invention?

A．It will lead Rao to make a fortune.

B．It will help millions of Americans drink safe water.

C．It will promote the development of science in America.

D．It will soon settle the lead­polluted problem thoroughly.

【回答】

5.A　推理判斷題。根據第二段第一句“In just three months, Rao came up with a device (裝置) that can replace the costly and lengthy tests currently used to reliably determine lead levels in our fresh water.”可推知，與以前又貴又費時的裝置相比，Rao所發明的裝置既便宜又省時，與第三段最後一句“This reaction is then registered by the Bluetooth reader, which sends a signal to a mobile app that can tell you immediately if your water is safe to drink.”相呼應，故選A。

6.D　細節理解題。根據第二段第二句“Inspired by the current litigation (訴訟) in Flint, Michigan, a case of water pollution from 2014 until present, Rao designed a new testing system that resulted in her being named ‘America's top young scientist’ for 2017.”可知，Rao設計測試水中鉛水平的裝置的想法是受一個水汙染訴訟的啟發，故選D。

7.B　推理判斷題。根據第三段倒數第二句“To put it simply, the cartridge contains carbon nanotubes (奈米管) that react to lead.”可推知，這個碳奈米管是可以對鉛起反應的，因此可以檢測出水中是否含有鉛，故選B。

8.B　推理判斷題。根據最後一段最後兩句中的“While we may not be aware of any lead pollution present in our aging pipelines, lead poisoning can cause delays in physical and mental development.” “her incredible invention could make a difference to millions of people in the United States”和對本段的整體理解可推知，作者認為Rao的發明可以幫助人們快速檢測出水中是否含有鉛，從而可以大大提高人們飲用水的安全*，意義重大，故選B。

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