跟聚精会神有关的成语

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离子用什么符号表示?原子用什么表示?,分子用什么表示? 钠原子形成离子符号是___________ In an English exam,student A,B,C and D were in the first four places.After the exam,A said,"I won't be the forth place." B said,"I am second,"C said ,"I am in the place before A." D said,"I am two more places ahead of C." But only one of then was wro He is the only one of the students ___late this morning.A.who was B.who were C.that were D.whom wa为什么不选that?如果只是单复数的原因,那如果有 that was 这个选项,应该选哪个?D选项是 whom was 英语翻译当然,他也要靠他的努力才能有现在这样的成就. (英语)帮手翻译个句子Our coach is the strongest presence on our team.那个strong presence尤其不明白 求清朝末年中国政治、经济、军事、文化、社会、外交的概况介绍.不需要太长,只要史实就成.比如经济总量之类. 求翻译It's March, 2050. Frank and Mary Smith wake up in their comfortable house in the morning andswitch on the bedroom computer to get the latest news. They used to read the Times, but changed to electronic newspapers many years ago. There is th 英语翻译有外国人要打电话,我问:你要打这个电话吗?(怎么说?)没人听我说:没人听电话.(怎么说?)最后和他收费时说:先生,请付这个电话的电话费.(怎么说?) for to of with 区别thanks 城镇化和城市化有什么区别 城镇化和城市化的区别,小城镇建设和城镇化、城市化有什么联系 景德镇有哪些出名的瓷器? 景德镇最有名的瓷器有几种? 景德镇有哪些卖瓷器的地方,都在哪里?从景德镇火车站到这些地方怎么走? 混凝土表面气泡产生的原因主要有哪些?求解答 胃液中的ph值为多少 混凝土柱子表面有气泡的原因是什么?柱子拆模过后发现很多小气孔,想知道会不会影响回弹度! 大量饮水会使胃液的PH值怎样变化?变大?变小?还是不变?胃液的PH是0.5到1.5 抗渗混凝土试块表面气泡过多怎么办?如何防止气泡过多? 英语翻译没有什么可以阻止我微笑(放肆的笑) 求翻译成地道点的英语 怎么挑瓷器?青花 选一种带有厚重文化气息的物品,仿照《景德镇的瓷器》的写法,写一段话介绍一下 英语翻译The last Monday in March is an important day in China.It is a day for school safety education.This year,the day falls on March 25.It helps students learn more about safety and make sure they are safe.What are some accidents at school?How theory theory,the FMS model and simulation theory 英语翻译总觉得怪怪的 英语翻译 混凝土怎么减少气泡产生? 水泥使用中,若混凝土使用高效减水剂,则容易产生气泡,应如何避免? be bored后加of还是with,还是都可以,有什么区别? 怎样才能减少气泡的产生?出现气泡时,如何才能去除?制作洋葱表皮怎样才能减少气泡的产生?出现气泡时,如何才能去除? 景德镇的瓷器最早开始于什么朝代.