and summer are here for good.The idea of daylight savings time started with Benjamin Franklin (1706-90... how a lot of the money spent on candles used for light (this was before electricity) could be saved ……

Bright mind of Gaza (P3)Bright mind of Gaza (P3)Choose the answer:Choose the answer:1. Why was Al... invented a lightbulb.C. Because he used fans to make electricity.C. Because he used fans to make ……

to weeksc. a fl ash of bright light in the sky that is produced by electricity moving between clouds or from clouds to the groundc. a fl ash of bright light in the sky that is produced by electricity ……

is as bright as a 100-watt incandescent lamp. The only problem for consumers (消费者) is that energy saving lamps are more expensive. Using energy-saving lamps saves electricity (电). According to the National ……

of electricity are seen everywhere.Currently, most countries rely on coal-burning power plants... knows for sure what the years ahead will look like when it comes to electricity, but if solar power ……

of electricity are seen everywhere.Currently, most countries rely on coal-burning power plants... for sure what the years ahead will look like when it comes to electricity, but if solar power ……

electric wand (棍、棒).The idea comes from an observation 200 years ago, that electricity can affect...AS well as lighting up bulbs, electricity can also put out fires. Scientists from Harvard ……

.The new idea is about fuel cells using chemical reactions to produce electricity.What can make fuel cells....The new idea is about fuel cells using 3 to produce electricity.Scientists had tried 4 enzymes ……

.The new idea is about fuel cells using chemical reactions to produce electricity.What can make fuel cells....The new idea is about fuel cells using 3 to produce electricity.Scientists had tried 4 enzymes ……

the view of a bright future with the development of hi-tech, but others think the opposite. They even... of silly idea is just to avoid problems rather than work out solutions.Science also gives us many ……

can save a lot of electricity (电). More importantly, this project will make our dream of “lighting... is not that bright. It’s similar to what we see at dusk (黄昏), and people can control its light. So ……

Fireworks come in many bright colors. TUCHONGFireworks come in many bright colors. TUCHONGFireworks... fireworks are kind of a bad idea. The evening sky is blue. This means that other shades of blue cannot ……

an electric wand (棍、棒).The idea comes from an observation, 200 years ago, that electricity can...AS well as lighting up bulbs, electricity can also put out fires. Scientists from Harvard ……

University High School, US. Herbst made a small turbine (涡轮机) called Beacon. It can make electricity (电... a prize of $25,000 (159,000 yuan). She wanted to help people in developing countries (发展中国家). The idea ……

. They can save money in the long run,"said a British official.CFLs use 67 percent less electricity..., electricity use would be cut by 18 percent. There would also be much smaller amounts ofgreenhouse gases(温室 ……