问题
判断题
单相罩极式异步电动机中磁场上短路铜环的作用是消除铁芯振动。
答案
参考答案：错
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单相罩极式异步电动机中磁场上短路铜环的作用是消除铁芯振动。
参考答案：错
Jogging became popular some twenty years ago and has remained a favorite way of keeping fit．It is running at a steady speed over short or long distances．Teenagers can jog and ，with caution , can people in their seventies . One of the main jogging has over many other sports is that it can be done anywhere . People jog around campuses , in parks and even in urban areas . Special fields and running tracks are not . Similarly , no special is required—no costly hats , gloves , or balls . Good quality running shoes are , but otherwise the jogger can simply wear loose , comfortable clothing . Having bended and as basic warm-up , you are ready to begin jogging now .
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