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1、 The sun (照亮) the earth and gives us heat.
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2、 We should (节约) water and electricity in our daily lives.
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3、 The (电线) in the wall carries electricity to every room.
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4、 The light bulb is a useful (发明) by Thomas Edison.
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5、 Be (小心的) when using a knife to open the box.
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6、 We can't live without (电) in modern society.
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7、 从方框中选择合适的词并用其正确形式填空。
connect, produce, safety, change, difference
(1)、Always pay attention to when working with electrical equipment.(2)、Wind turbines (风力发电机) electricity from wind power.(3)、Can you this electrical energy into mechanical energy (机械能)?(4)、Please the printer to the computer via USB cable.(5)、There are many between traditional and modern power stations. -
8、 The ____ of solar energy is becoming more popular in daily life.A、use B、useful C、useless D、using
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9、 Paper-making is one of the greatest inventions in Chinese ____.A、culture B、history C、society D、art
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10、 The sky is dark. There ____ be a thunderstorm tonight.A、maybe B、may be C、may D、might
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11、 Visitors must get ____ from the office before entering the science lab.A、instruction B、permission C、invitation D、information
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12、 —____ I use your charger? Mine is broken.
—Yes, but you ____ return it before class.
A、Must; can B、Could; must C、Need; may D、Should; might -
13、 The local power station ____ electricity to over 100,000 homes in the city.A、provides B、offers C、gives D、supplies
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14、 The new light bulb ____ a lot of heat besides light.A、gives up B、gives in C、gives off D、gives away
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15、 It's necessary for students ____ how to use electricity safely at home.A、learn B、learning C、to learn D、learned
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16、 The Internet ____ people from different countries, making the world smaller.A、separates B、connects C、divides D、breaks
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17、 ____ we can't see air, we know it exists (存在).A、But B、And C、So D、Although
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18、 Microwave ovens use electricity ____ food quickly.A、cook B、cooking C、to cook D、cooked
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19、 Many people today only ____ about earning money and forget to enjoy life.A、care B、think C、look D、talk
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20、 Remember to ____ the fan when you leave the room to save electricity.A、turn up B、turn down C、turn off D、turn on