Was Einstein really poor in his studies when he was a child?
The Answer is:
The myth that Einstein was a poor student is false; his early self - study shows high potential, non - conformity misled.
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What unique anti-counterfeiting techniques were used on the world's first paper money?
The Answer is:
The world's first paper money, Jiaozi in 11th - c. China, used special materials, printing, and official management to prevent counterfeiting.
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How did ancient civilizations preserve perishable food without modern refrigeration technology?
The Answer is:
Ancient civilizations preserved perishable food via drying, salting, and fermentation for stable supply.
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