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磁回路是电机中非常重要的组成部分,T是( )单位。
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磁回路是电机中非常重要的组成部分,安匝是( )单位。
磁回路是电机中非常重要的组成部分,A/m是( )单位。
电力机车直流牵引电动机通常采用调速方法有____和____。
Directions: Translate the following passage from English to ChineseParents often expect their sons to be more interested in the world outside the family than their daughters. Many parents also believe that daughters need more protection than sons. For example, they may require their daughters to come home earlier at night and forbid them to go to places where they might let their sons go. Such protectiveness often discourages girls from being independent and exploring their environment. Increasingly today, many parents try to bring up their children in a gender-neutral way. They encourage their sons to express their feelings. They encourage their daughters to be independent.
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