题目内容

Directions:In this section, you are going to read a passage with ten 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. Answer the questions by marking the corresponding letter on Answer Sheet 2.Robot Management

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假设检验的基本原理是_________。

变压器铁心采用相互绝缘的薄硅钢片的目的是为了降低()。

A. 铁损耗
B. 铜损耗
C. 功率损耗
D. 杂散损耗

如果将额定电压为220/24V的变压器接入220V的直流电源,将发生什么现象( )。

A. 输出24V交流电
B. 输出24V直流电
C. 输出220V交流电
D. 没有电压输出

三相变压器的变比是指()之比。

A. 原副边相电势
B. 原副边线电势
C. 原副边线电压
D. 原副边相电压

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