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危机的发生与个人的性格有着很大的关系。（）
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The development of electronics has had three important steps: computer, intergrated circuit and vacuum tube.
The most advanced intergrated circuits are the microprocessors,which controls everything from computers and cellular phones to digital microwave ovens.
Communication had surpassed radio for home use and entertainment.
Three key components are vacuum tube, transistor and intergrated circuit.
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