what's the most useful invention?我有急用.是作文............
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what's the most useful invention?我有急用.是作文............
what's the most useful invention?我有急用.
是作文............
what's the most useful invention?我有急用.是作文............
Bulbs/lights
电灯泡
Just imagine what our world would be like without lights at night.
There would be no road lights,the cities will be in darkness.
How would people the colourful nightlife without lights?
No movies,no KTVs,no cinemas,no grand hotels or restaurants.
Even in the countryside,life without lights could be very inconvenient.
Without lights,night schools would be paralysed.
Factories,companies would be seriously inefficient.
Without lights,our modern world could hardly run.
Undoubtedly,light is the most important invention.
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computer
glasses............应该是。因为发明其他东西的人可能还戴着眼镜
Wheel !
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