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电荷放大器的作用是什么？

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隔离电路的作用是什么？绘制变压器隔离和光电隔离两种隔离方式的原理框图，说明各自特点

Directions: You are going to read a passage with 10 statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter.Developing the heroic imagination: The traits of heroes

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经营租入的固定资产应在( )中登记。

A. 备查账簿
B. 总账
C. 日记账
D. 明细账