摩擦锥是一个顶角为摩擦角的圆锥。A. 正确B. 错误

物体运动的快慢用________表示。在相同时间内，物体经过的路程越长，它的速度就越快；物体经过相同的路程，所花的时间越短，速度越快。在________中，________。在物理学中，为了比较物体运动的快慢，采用________________________的方法，也就是将物体运动的路程除以所用时间。这样，在比较不同运动物体的快慢时，可以保证时间相同。计算公式：v=S/tS/t其中：s——路程——米(m)；t——时间——秒(s)；v——速度——米/秒(m/s)国际单位制中，速度的单位是________，符号为________或________________，交通运输中常用________做速度的单位，符号为________或________________，________________________________。v=S/t，变形可得：s=vt，t=S/t。l)a state of long unnatural deep unconsciousness caused by disease, poisoning, a severe blow and so onm)a mixed feeling of respect, fear and wondern)pull or carry with great effort and difficultyo)speak in a low but not clear voicep)great or noisy confusion or excitementq)very strong, obsessive desirer) dependably loyal and firms)in very high spiritst)group of people who share the same opinionⅡ. Fill in each blank with the derivative of the words in parentheses. 10%1) I owe you an ____becauseIwas so bad-tempered yesterday.( apologize)2)It seems that they are tired of the hustle and bustle of the city life and would like to live ____ lives in their own little world. (isolation)3) To earn a raise you need to take more_____ and show more enthusiasm for the job. ( initial)4)Ikeep strictly to my subject and remember not to introduce anything____ to the subject. ( relevant)5) Good news came in ___ from the battlefield. (succeed)6)Shakespeare is, by common ______, the greatest Englishdramatist. (consent)7)The ___ of job isthecharacteristic of an economic recession.(scarcely)8) Air pollution has become a great_____for human being in modern society. (pose)9）The ____ of the new library is scheduled on Monday. (inaugurate)10)Quickness of____is the mark of a good student.(apprehend)Ⅲ.Fill in the blanks with prepositions and adverbs. 8%1)It was out of our expectation that he rounded ____ his teaching career by entering the business of fur trading.2)The boss seems to have some prejudice ___ the young inexperienced worker.3) We all bent _____ finishing the job in time no matter how hard it is.4) He put the books and magazines on the bookshelves _______ random .5)He used to look down upon his poor relatives because they were all ___ the dole.6)Japanis a country which is subject ___ earthquake.7)Usually the interviewer attaches great importance ___ the educational background, abilities and past experience of theapplicant.8)The staff in this company are entitled ____ free physical examination once a year.9)He is the best one whom you can fall ___ on when you are in difficulty.10)Every student in our school is supposed to act in accordance ____ the school rules and regulation.You are no exception.11) He was caught red handed in the super market for tucking a box of chocolate _____ in his over coat.12) This kind of place is______ of bounds to children under 16.13)Although we consider these expressions nothing butclichés, they appeal very much ___ the student.14)In order to make the situation less tense,Istruck ____ a conversation with the angry young man.15) In order to extricate itself ____ heavy debts, the company closed all the factories which manufactured products with poor records.16) In many urban families inChina, the parents impose much too great expectations ____ their children by sending them to evening or weekend classes of various kinds.Ⅳ.Paraphrase the underlined parts of the following sentences. 21%1) Once the manufacturing________, the motoring world________2) T________________________3)Don’t________that a reader________to be solely________4) We can’t________________________________because it is________________________________________a single yardstick,________English as“good”or“bad”.5)Once he is in the library he________6) Let us________most of the euphemisms though________________7) When he heard he had to________into three groups and teach them________________Ⅴ.Use the words given in parentheses to translate the following sentences. 21%1) 在这家餐馆用餐很经济实惠,你只需花十元钱就能尽情享受到各式各样的美味。( content, variety )2) 城市最突出的特点是喧嚣不堪,与城市显然不同的是,山村里到处寂静安宁。( distinctive, contrast)3) 他很固执己见,所以很难跟别人有共识。(cling, common )4) 除非你很好地掌握了各种语体,否则你无法在各种场合恰如其分地用英语进行表达。( unless, command )5) 他的一番讲话没有很好地解决问题，反而使问题陷入僵局。(bring, rather than)6) 当那位著名的运动员出现在运动场时,全场报以雷鸣般的掌声。(turn, erupt)7）如果你想你的阅读有所收获而不仅仅是为了打发时间,你就必须以一种精神集中的状态去阅读。( more than)Ⅵ. Choose the best one to complete each sentence. 10%1)The policy ___ made, the next problem was how to carry it out.A. having been B. being C. had been D. was2) My cousin Marry is often in a poisonous mood;Isuppose it’s because she is ____child.A. one B. a unique C. a single D. an only3) The two scholars worked at the task of writing a preface to the new dictionary for three hours ___ last night.A. at length B. in full C. on end D. in time4) When the crowd saw the prize-fighter stretched out on the canvas, shouts and cheers ___ from it.A. broke up B. broke forth C. broke through D. broke upon5)Idon’t think those curtains ___ very well with the wallpaper.A. suit B. go C. fit D. match6) Paul was lying on the lawn, his hands ___ under his head.A. were crossed B. were crossing C. crossing D. crossed7) There is no ___ in applying for that job, as you are not properly qualified.A. reason B. point C. result D. chance8) It was strange that she would _____ such an absurd idea.A. allow B. stick C. take D. entertain9) ___ the opportunity, he might well have become an outstanding cartoonist.A. Given B. To give C. Giving D. Being given10) Present at the Christmas party were the two princesses and their ___ husbands and the Duke of Edinburgh.A. respectable B. respectful C. respective D. respected11) She is always fashionably dressed and looks ____ among the girls in plain clothes.A. outstanding B. conspicuous C. unusual D.distinguishing12) ____ he needed money for a new car, he decided not to borrow it from the bank.A. Much as B. Much though C. As much D. Though much13) His strong sense of humor was ___ make everyone in the room burst out laughing.A. so as to B. such as to C. so that D. such that14)“_____,Iwill seek it”, said the leader of the the organization.A. May the truth what it be B. Be the truth what it mayC. Be the truth what may it D. May the truth as it be15) Although he has has become rich, he is still very_____ of his money.A. economic B. thrifty C. careful D. frugal16)I wonder who drank all the milk yesterday. It ___ have been Peter because he was out all day.A.mustn'tB. can'tC. won'tD. needn't17) Much as ___,Icouldn’t lend him the money becauseIsimply didn’t have that much spare cash.A.Iwould have liked to B.Iwould like to haveC.Ishould have to like D.Ishould have liked to

已知氢原子的归一化基态波函数为-|||-(varphi )_(1s)=((pi {{a)_(0)}^3)}^-dfrac (1{2)}etimes p[ -dfrac (r)({a)_(0)}] -|||-(1)利用量子力学基本假设求该基态的能量和角动量;-|||-(2)利用位力定理(即维里定理)求该基态的平均势能和零点能。

在双缝干涉实验中 , 若单色光源 S 到两缝 S1 、 S2 距离相等 , 则观察屏上中央明条纹位于图中 O 处。现将光源 S 向下移动到示意图中的 S′ 位置 , 则 () S1-|||-s-|||-s`s2 A. 中央明条纹也向下移动，且条纹间距不变 B. 中央明条纹向上移动，且条纹间距不变 C. 中央明条纹向下移动，且条纹间距增大 D. 中央明条纹向上移动，且条纹间距增大

X射线与物质相互作用主要过程包括()A. 光电效应B. 康普顿效应C. 电子对效应D. 相干散射

7.[填空题]阿基米德通过“平衡法”，成功推导出了______的体积计算公式，这一方法体现了他将力学原理与数学推理相结合的独特思维。

极化的实质是:在外加电场的作用下，介质内部出现很多排列方向大致相同的____输入答案____

如图所示，匀强电场场强为1×103N/C，ab=dc=4cm，bc=ad=3cm，则下述计算结果正确的是（）a-|||-E-|||-d······ ......cA.ab之间的电势差为4000VB.ac之间的电势差为50VC.将q=-5×10-3C的点电荷沿矩形路径abcda移动一周，静电力做功为零D.将q=-5×10-3C的点电荷沿abc或adc从a移动到c静电力做功都是-0.25J

【题文】关于摩擦力，下列说法中错误的是（）A. 滑动摩擦力的大小跟物体间的压力和接触面的粗糙程度有关B. 在相同条件下，滚动摩擦比滑动摩擦小C. 在任何情况下摩擦力总是有害的D. 轮胎上有凹凸不平的花纹，是为了增大摩擦

速度边界层的厚度是指从壁面起始到流体的速度达到主流体速度的99%的距离。A. 正确B. 错误