More than 1.5 billion people around the wo

题目内容：

More than 1.5 billion people around the world live without electricity. Finding better ways to bring light to the poor is the goal of researchers like Professor Irvine. In the late 1990s, he was working in Nepal when his return flight was canceled. A delay gave him time to take a fourteen-day hiking trip in the Himalayas.

One day he looked in the window of a school and noticed how dark it was. This is a common problem for millions of children around the world. Many families use kerosene oil (煤油) lamps. There are many problems with these lamps. They produce only a small amount of light. They are dangerous to breathe. And they are a big fire danger, causing many injuries and deaths each year. Kerosene costs less than other forms of lighting, but it is still costly in poor countries. Professor Irvine says many people spend over 100 dollars a year on the fuel.

When he returned to Canada, he began researching ways to provide safe and clean lighting. He began experimenting with light-emitting diodes (发光二极管), LEDs, at his lab. As a professor of renewable energy, he already knew about the technology. Light-emitting diodes are small glass lamps that use much less electricity than traditional bulbs (灯泡) and last much longer. He used a one-watt bright white LED made in Japan. He found it on the Internet and connected it to a bicycle-powered generator (发电机). He remembers thinking it was so bright that a child could read by the light of a single diode.

In 2000, after much research and many experiments, he returned to Nepal to put the systems into homes. Now the homes of 25,000 people in 51 countries have been equipped with it. “The one-time cost of our system which basically lives forever, as well as the solar panel — is less than one hundred dollars. So, one year of kerosene would pay for a solid-state lighting system,” he said. Now his aim is to develop a lower-cost lighting system. In January, Irvine is leaving the University of Calgary. He has also decided to start his own company in India.

小题1:We can learn from the second paragraph that kerosene oil lamps ______.

A．cost more than other forms of lighting

B．have damaged children’s eyesight

C．have wasted only a little fuel

D．have a lot of disadvantages小题2:Irvine connected a white LED to a bicycle-powered generator to prove ______.

A．whether it can work without electricity

B．whether it can work well with less electricity

C．whether it can last longer than a generator

D．whether it is brighter than a traditional bulb小题3:We can learn from the text that Irvine ______.

A．likes India rather than Nepal

B．is good at making new kinds of bulbs

C．is giving up his job in the university

D．is to earn much money from his company

最佳答案：

小题1:D

小题1:B

小题1:C

答案解析：

小题1:D 第一题询问煤油灯有关的信息，在第二段第四句话有提到There are many problems with these lamps，即它有许多缺点，故选择D

小题1:B 第二题考察科学家做发光二级管实验的目的，同样在原文中有提到Light-emitting diodes are small glass lamps that use much less electricity than traditional bulbs，可推测得知他是想测试二极管在使用更少的电量时能否正常工作。

小题1:C 同样在原文中有直接提到。最后一段倒数第二句话Irvine is leaving the University of Calgary，可知他辞去了在大学的工作，故选择C

考点核心：

人物传记类文章的文体特征：

人物传记是记叙文体的一种，主要描写某人的生平事迹、趣闻轶事、生活背景、个性特征、成长奋斗历程等，包含记叙文的时间、地点、人物、事件等要素。其特点是以时间的先后或事件的发展为主线，空间或逻辑线索贯穿文章始终，脉络清楚，可读性较强。