问题详情：
What will power your house in the future? Nuclear wind or solar power? According to scientists at the Massachusetts Institute of Technology(MIT) in the US, it might be artificial leaves.
Natural leaves are able to change sunlight and water into energy. It is known as photosynthesis (光合作用). Now researchers have found a way to imitate this process.
The artificial leaf developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip with catalysts(催化剂). Similar to natural leaves, it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell (电池), using those two materials to produce electricity, located either on top of a house or beside the house.
Though the leaf is only about the shape of a poker card, scientists claimed that it is promising to be an inexpensive source of electricity in developing countries. “One can imagine villages in India and Africa not long from now purchasing an affordable basic power system based on this technology” said an American scientist, Nocera.
An artificial leaf is not a new idea. The first artificial leaf was invented in 1997 but was too expensive and unstable for practical use. The new leaf, however, is made of cheap materials, easy to use and highly stable. In laboratory studies, Nocera showed that an artificial leaf could operate continuously for at least 45 hours.
The wonderful improvements come from Nocera’s recent discovery of several powerful new, inexpensive catalysts. These catalysts make the energy transformation inside the leaf more efficient with water and sunlight. Right now the new leaf is about 10 times more effective at carrying out photosynthesis than a natural one. Besides, the device can run in whatever water is available. This is important for some countries that don’t have access to pure water.
Hopefully, each home could have access to the new application in the future.
purpose of this article is to _____.
oduce a new kind of device people to do the research
rtise the new product the process of photosynthesis
h of the following is NOT the advantages of the new leaf?
’s low in cost. ’s small in size.
has a wonderful fuel cell. ’s convenient for people to use.
conclusion can be drawn from the text?
ra thought the new leaf is expensive for developing countries.
ages in Africa have benefited a lot from the new invention.
con chip can help the new leaf work more effectively.
equipment doesn’t necessarily operate in pure water.
’s the writer’s attitude towards the new device?
tive. mistic. tful. rtain.
【回答】
1.A; 2.C; 3.D; 4.B 解析：1.主旨大意题.本文主要介绍了一项仿造叶子光合作用的发明--人工叶子工作原理、工作*能和工作条件,可为发展*家提供便宜的能源;故选A. 2.细节理解题.根据文章第三段"Similar to natural leaves,it can split water into hydrogen and oxygen when put into a bucket of hydrogen and oxygen gases are then stored in a fuel cell"可知新叶可以制造燃料电池而不是拥有;故选C. 3.细节理解题.根据倒数第二段"Besides,the device can run in whatever water is available"可知这些设备不一定在纯水中工作;故选D. 4.推理判断题.根据最后一段"Hopefully,each home could possibly have the access to the new application in the future"可知作者对这种新设备的态度十分积极支持;故选B.
知识点：科普环保类阅读
题型：阅读理解
