英语翻译i（ ）（ ）（ ）the eve of the spring festival

Na+和Ne是等电子体,为什么他们的第一电离能差别大（I(Ne)=21.6eV I（Na）=47.3eV）错了。I（Na+）=47.3eV写掉了 电子伏特（ev）怎么转化成伏特（v）? 具有下列哪一能量的光子能被处在n=2的能级的氢原子吸收?(A) 1.51eV (B) 1.89eV （C）2.16eV (D) 2.40eV 急,英语单词填空In the future the students （talk）to their teachers on their computers.I'm afraid there （be）a meeting this afternoon.I have to go.---------you----------（be）here this Saturday?No,I （visit）my teacher.I think that ev 英语翻译I prefer the music that （） 已知氢原子基态的能量为E1=-13.6ev,第n能态的能量为En=E1/n2,对一定质量的氢气用连续光谱照射,则可能被吸收的光子能量为：（ ）A、0.85ev B、1.89ev C、3.4ev D、14ev为什么是选BD, 关于跃迁释放能量问题.氢原子基态能级为-13.6eV,一群氢原子处于量子数n=3的激发态,他们向较低能级跃迁时,放出光子的能量可以是（） A.1.51eV B.1.89eV C.10.2eV D.12.09eV headmaster has to Beijing.She’ll be back in a weekMy parents (teach)English in this school for ten years.2.My friend Amy (be )to the zoo a lot of times.3.Last night I watched an (amuse) football match.4.Neither Jim nor I （be）good at math.5.I ev 在研究微观粒子时常用电子伏特（ev）做能量的单位.1ev等于一个电子经过1v电压加速后所增加的动能,那么，1ev等于多少焦耳？ 常用电子伏特（eV）做能量的单位.1eV等于一个电子经过1V电压加速后所增加的动能,那么,1eV等于多少焦耳 It has little or nothing to do with the .(这段话是这篇文章的关键,我却看不懂了）It has little or nothing to do with the model that I want to focus on.To use a common quote by Donald Knuth,Premature optimization is the root of all ev It has little or nothing to do with the .(这段话是这篇文章的关键,我却看不懂了）It has little or nothing to do with the model that I want to focus on.To use a common quote by Donald Knuth,Premature optimization is the root of all ev （ ）1.- What did you do just now?- I ______ a hole for planting the tree.正确答案是：dug（ ）2.There's someone ______ the door.Who can it be?正确答案是：at（ ）3.His daughter does's live with him,but she gives him a ring______.A.ev （ ）1.- What did you do just now?- I ______ a hole for planting the tree.正确答案是：dug（ ）2.There's someone ______ the door.Who can it be?正确答案是：at（ ）3.His daughter does's live with him,but she gives him a ring______.A.ev （ ）There are thirty students in our class.Twenty are girls,______students are boys.A.the other B.other C.another D.the others（ ）Let him______home to watch TV.A.goes B.going C.to go D.go（ ）I usually sleep eight hours______.A.every day B.ev eV（电子伏特,能量单位）和J（焦耳）怎样换算?要思维过程, 物理单位eV（电子伏）和J（焦）如何转换?RT 1ev等于多少开（K）?或者1J=?K