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【简答题】
设想在银这样的,导电电子数等于原子数。当 直径的银线中通过 的电流时,电子的漂移速度是多大?给出近似答案,计算中所需要的那些你一时还找不到的数据,可自己估计数量级并代入计算。若银线温度是 ,按经典电子气模型,其中自由电子的平均速率是多大?
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【简答题】There are 10 errors, try to locate and correct them. Americans believe no one stand still. If you are not moving ahead, you are falling before. This attitude results in a nation of people committing t...
【简答题】P1 (Paras 1-2) General statement _____1____is one of the two elements that Americans have ever cherished most because they believe if you are not _______2_______, you are _______3_______. They are sla...
【简答题】Para.1 Americans believe no one stands still. If you are not moving ahead,
you are falling behind. This attitude results in a nation of people
committed to researching,experimenting and exploring. T...
【简答题】considered, competent, interaction, assess, consequently, results, exploring, precious, acute, count, rush, exchanges, resent, conduct, devices, We, Americans, believe no one stands still....
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