用电一定要小心。Electricity runs many of our home appliances (家用电器). It’s very useful, but it’s also very dangerous. If it is used in the wrong way, it can kill. Old and fake (劣质的) appliances should ……

Wind can do a lotWIND is useful for people. The early ships went across the sea with the help... enough electricity for a small town. Windmills are clean but they are big and noisy.Cooking ……

became a useful development from electricity. ……

kinds of fish can make some electricity. The electriceel(电鳗) is one of them. It is like abattery(电池). A 20-foot eel can make enough electricity to light 12bulbs(灯泡).Electric eels live in the Amazon ……

into a very thin wire (线) that still conducts electricity (传导电), making it useful for making... got it, it is useful. Gold can be drawn into a very thin wire (线) that still conducts electricity ……

management officer (物业管理人员) might be fixing it. Don’t worry, the electricity will likely be back... management officer (物业管理人员) might be fixing it. Don’t worry, the electricity will likely be back ……

officer (物业管理人员) might be fixing it. Don’t worry, the electricity will likely be back soon... (物业管理人员) might be fixing it. Don’t worry, the electricity will likely be back soon ……

be useful in taking over some dangerous jobs performed by humans.Tigers are supposedly not eatenTigers... per cent of China's electricity generating assets and 90 per cent of the electricity delivery assets ……

服) can also be dangerous? News stories about down jacket explosions (爆炸) come out every winter. Why do... be dangerous? News stories about down jacket explosions (爆炸) come out every winter. Why do some down ……

Down jackets (羽绒服) are warm, but also dangerous sometimes. News stories about down jacket..., but also dangerous sometimes. News stories about down jacket explosions (爆炸) while being washed come ……

, however, make the first useful one.Joseph Swan of England made the first lightbulb in 1878.Lightbulbs make light by using electricity toheat(加热) a thin piece ofmaterial(材料) (called afilament(灯丝) until ……

, however, make the first useful one.Joseph Swan of England made the first lightbulb in 1878.Lightbulbs make light by using electricity to heat (加热) a thin piece of material (材料) (called a filament (灯丝 ……

用你的膝盖给手机充电！词数 96 建议阅读时间 3分钟TIE it to your knee and walk and it generates electricity. Invented.... Scientists say it could be very useful to hikers or soldiers. The only problem is it's too heavy right now ……

electrical box. B. Electrodes.A. A small electrical box. B. Electrodes.C. Electricity. D. An App.C. Electricity. D. An App.2. What is Paragraph 3 mainly about?2. What is Paragraph 3 mainly about?A. Why ……

surgeries (手术) and more. Human-like robots will become very useful in the fields of scientific research and disaster relief. They will also help undertake security checks in dangerous environments ……