北电毕业的明星

“通断电流的操作电器”是不是指的就是具备类似开关性能的设施?比如负荷开关及断路器,继电器及接触器,10A及以下的插头与插座,半导体电器.为什么10A可以,而16A及以下的插头与插座就不能 电器最小通断电流怎么测出来的 有触点电器对电路通断的控制由什么实现? 当装设漏电电流动作的保护电器时,中性线必须同时被通断.为什么? 请问frightened/scared/terrified/afraid的区别?他们都有受惊的、担心的的意思,怎么区分?（尽量正规一点,是老师布置的作业） be afraid of be scared of 区别 害怕的侧重点是什么 试过说害怕演讲用哪个? afraid、frightened、scared有什么不同? frightened scared terrified afraid区别 英文,英语,外文.afraid / scared / frightened / terrified 有什么不同? She has beautiful long black hais.改成否定句.She has no beautiful long black she has hair a.beautiful long black b.long beautiful black c.black long beautifui d.beautiful blac beautiful long black hair 和 long black beautiful hairMolly has ( )hair.A.long beautiful black B.long black beautifulC.black long beautiful D.beautiful long black必须选择一个 应该是哪个呢? Who is the tallest in your class请问这个句子里面的the一定要加么 太难的听不懂 Who is ______ in your class, Tom or Jerry? A. the tallest B. taller C. tallestWho is ______ in your class, Tom or Jerry?A. the tallest B. taller C. tallest我知道Who is the tllest student in your class?也知道Who is taller, Tom or Jerry?但 who is the tallest is your class?回答 who is the tallest in your class翻译过来是什么 下列各电器分别是利用电流的什么效应工作的电熨斗、电解槽、电烘箱、电饭锅、电烙铁、电磁铁、电话、电磁继电器、电铃、白炽灯、保险丝、电炉、电风扇、电冰箱.请把它们分一下类. BEC高级如何准备我准备明年五月份考BEC高级,中级已过.可是最近准备复习的时候却不知道该看哪些书,因为我已经大三了,课业方面比较紧,就想用真正有用的书.希望各位考过的前辈给我指点一 怎么准备bec高级本人现在是大三,想在明年5月考bec高级,没学过中级~大学四六级均一次通过,不过分数不是很高.上个月考了雅思,6分,本来想这个学期先报了中级考一下的,不过由于时间原因没报 BEC高级如何准备啊? BEC高级怎么准备啊?我六级裸考576....这个还有一个月了，本来打算好好学的，结果找工作又耽误了....欲哭无泪。现在还来得及么? wear中ea的发音 Debbie got up early last Saturday morning.She w anted ____ in green park with some lf her friends. 语音题：选出于其他发音不同的单词 ea的部分A great B jeansC teaD meat She saw some elephants in the zoo last Sunday.是什么意思? What __she __(find) in the garden last morning?She__ (fing) a beautiful butterfly帮我填BE动词的适当形式， I asked my mother for some writing paper.She bought some in the stationary last week.改写为含定语从句的主从复合句I met the old woman again.I helped her cross the street the day before yesterday.5.I often go to the park.I can take a walk a few和a little修饰形容词比较级时有什么区别 啄木鸟颁奖词100字 Helen is a beautiful girl.She has long hair.合并为一句. she is the most beautiful girl in the classGIRL可以省去伐? the girl is in a beautiful dress.she looks very m___