2016英语名校模拟精华30题

　　1.【海南省海口市湖南师大附中海口中学2016届高三第一次模拟】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 leaves—but artificial(人造的)ones.

　　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 seemingly simple 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，which uses 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 Nocera at a conference of the American Chemical Society.

　　The 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，by contrast，is made of cheap materials，easy to use and highly stable. In laboratory studies，Nocera showed that an artificial leaf prototype(原型)could operate continuously for at least 45 hours without a drop in activity.

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