【简答题】三相交流异步电动机的调速可以用改变 ____________ 、 ___________ 和 ___________ 三种方法来实现。
【单选题】患者,男,18岁。因外伤造成右臂肱骨中段骨折而急诊人院。检査发现患侧第12掌骨间隙背面“虎口区”感觉消失,抬前臂时呈“垂腕”状态,其原因可能是骨折伴有
【简答题】Although the two players are in the tennis court, they are really good friends ________. A) partners B) enemies C) D) companions
【多选题】下列关于三相异步交流电动机的叙述中,正确的有______。
B.
直接起动的电流约为额定电流的5~7倍,电动机严重过热,以致烧坏
E.
大功率的三相交流异步电动机可以采用星形—三角形降压启动
【单选题】The two friends are ________ related like the lips and teeth, and you can often see them stay ________ together, hand in hand
【简答题】Two friends are having a picnic together. 36 names are Jack and Tim. Tim is very lazy (懒的) . 37 the first evening of their holiday, Jack says to Tim, “Here’s some money. Go and buy some meat.” “I’m to...
【简答题】The two friends are quite _______ each other. (commit)
【简答题】The two friends are _________ with each other in the corner.
【判断题】( ) 1. The two speakers are friends.