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【单选题】
高能 LiFePO 4 电池 , 多应用于公共交通。电池中间是聚合物的隔膜 , 主要作用是在反应过程中只让 Li + 通过 , 结构如图所示: 已知原理为 (1 - x )LiFePO 4 + x FePO 4 + Li x C n 放电 LiFePO 4 + n C 。下列说法不正确的是A.
充电时 ， Li ＋ 向左移动
B.
放电时 ， 电子由负极经导线、用电器、导线到正极
C.
充电时 ， 阴极的电极反应式为 x Li ＋ ＋ x e － ＋ n C == =Li x C n
D.
放电时 ， 正极的电极反应式为 (1 － x )LiFePO 4 ＋ x FePO 4 ＋ x Li ＋ ＋ x e － == =LiFePO 4
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【单选题】技术分析作为一种分析工具,其假设前提之一是:
A.
市场行为涵盖了一部分信息
B.
证券的价格是随机运动的
C.
证券价格以往的历史波动不可能在将来重复
D.
证券价格沿趋势移动
【简答题】Long,long ago there was a very foolish thief. Do you know what he did one day? When he wanted to steal( 偷 ) the bell on his neighbor's door, he walked up to the door, took hold of(抓住)the bell and pull...
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【单选题】As soon as the thief saw the policeman coming, he___________into a lane that happened to be a dead alley. A. made at B.made away C.made off D.made out
A.
made at
B.
made away
C.
made off
D.
made out
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