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 ……

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 ……

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 ……

, it comes in separate packets, like coins in a jar. This idea is called quantization and was introduced... packets, like coins in a jar. This idea is called quantization and was introduced by German scientist ……

were the bright, colorful designs on the fishermen’s hats useful?2. Why were the bright, colorful...?____________________________________________________________________________________________4. What is the main idea of the last ……

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 ……

, it comes in separate packets (小包), like coins. This idea, called quantization, was put forward... packets (小包), like coins. This idea, called quantization, was put forward by German scientist Max Planck ……