直流串励电动机的转速随着转矩的增加而迅速下降，即具有软的机械特性。
查看答案
起动机中换向器的作用是将交流电转变成直流电。
A. 对
B. 错
起动机完全制动时，电枢电流最大，因此发出的功率也最大。
A. 对
B. 错
根据以下句子，选出不可以合理组句的单词或词组。She hates her______ work.
A. part-time
B. difficult
C. detrimental
D. badly-regulated
Which of the following is not mentioned as an advantage in taking up part-time jobs?
A. Learning how to manage money
B. Having something to put on you CV
C. Having a taste of independence （独立）
D. Earning some money
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