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并励直流发电机的额定输出功率P_N等于( )。

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2021-07-17 23:52

A、<span style="font-size: 16.8px; background-color: rgb(255, 255, 255);">U</span><span style="font-size: 12.6px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; background-color: rgb(255, 255, 255);">N</span><span style="font-size: 16.8px; background-color: rgb(255, 255, 255);">I</span><span style="font-size: 12.6px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; background-color: rgb(255, 255, 255);">N</span>
B、<span style="font-size: 16.8px; background-color: rgb(255, 255, 255);">U</span><span style="font-size: 12.6px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; background-color: rgb(255, 255, 255);">N</span><span style="font-size: 16.8px; background-color: rgb(255, 255, 255);">I</span><span style="font-size: 12.6px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; background-color: rgb(255, 255, 255);">N</span><span style="font-size: 16.8px; background-color: rgb(255, 255, 255);">/η</span><span style="font-size: 12.6px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; background-color: rgb(255, 255, 255);">N</span>
C、<span style="font-size: 16.8px; background-color: rgb(255, 255, 255);">U</span><span style="font-size: 12.6px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; background-color: rgb(255, 255, 255);">N</span><span style="font-size: 16.8px; background-color: rgb(255, 255, 255);">I</span><span style="font-size: 12.6px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; background-color: rgb(255, 255, 255);">N</span><span style="font-size: 16.8px; background-color: rgb(255, 255, 255);">η</span><span style="font-size: 12.6px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; background-color: rgb(255, 255, 255);">N</span>
D、<span style="font-size: 16.8px; background-color: rgb(255, 255, 255);">以上都不正确</span>

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正确答案

A

试题解析

标签：新能源科学与工程专升本电机学期末考试

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