Flight simulator (飞行模拟器 refers to any electronic or mechanical system for training airplane and spacecraft pilots and crew member by simulating flight conditions. The purpose of simulation is not to completely substitute (1 actual flight training but to thoroughly familiarize students with the vehicle (2 before they (3 extensive and possibly dangerous actual flight training. Simulations also is useful for review and for familiarizing pilots with new (4 to existing craft. Two early flight simulators appeared in England within a decade after the first flight of Orville and Wilbur Wright. They were designed to enable pilots to simulate simple aircraft (5 in three dimensions, nose up or down; left wing high and right low, or vice versa; and (6 to left or right. It took until 1929, however , for a truly effective simulator, the Link Trainer, to appear, devised by Edwin A. Link, a self-educated aviator and inventor from Binghamton , New York. (7 airplane instrumentation had been developed sufficiently to permit "blind" flying on instruments alone, but training pilots to do so involved (8 risk. Link built a model of an airplane cockpit equipped (9 instrument panel and controls that could realistically simulate all the movements of an airplane. Pilots could use the device for instrument training, manipulating the controls (10 instrument readings so as to maintain straight and level flight or (11 climb or descent with no visual reference (12 any horizon except for the artificial one on the instrument panel. The trainer was modified (13 aircraft technology advanced. Commercial airlines began to use the Link Trainer for pilot training, and the US government began purchasing them in 1934, (14 thousands more as World War II approached.
Technological advances during the war, particularly in electronics, helped to make the flight simulator increasingly (15 The use of efficient analog computers in the early 1950s led to further improvements. Airplane cockpits , controls , and instrument displays had by then become so inpidualized that it was no longer feasible to use a generalized trainer to prepare pilots to fly anything (16 the simplest light planes. By the 1950s , the US Air Force was using simulators that precisely (17 the cockpits of its planes. During the early 1960s (18 digital and hybrid computers were adopted , and their speed and
flexibility revolutionized simulation systems. Further advances in computer and (19 technology , notably the development of virtual-reality simulation, have made it possible to (20 highly complex real-life conditions.
1. A. for
B. to
C. with
D. on
2. A. concerning
B. concern
C. being concerned
D. concerned
3. A. undertake
B. undergo
C. underplay
D. underuse 4. A. models
B. modifications
C. modifiers
D. modica
5. A. manifestations
B. manipulations
C. manifestoes
D. maneuvers 6. A. yawling
B. yawning
C. yawing
D. yawping
7. A. From then on
B. From now on
C. By now
D. By then
8. A. considerable
B. considerate
C. considering
D. considered 9. A. for
B. in
C. with
D. on
10. A. on the part of
B. on the basis of
C. on the track of
D. on the verge of 11. A. control
B. controllable
C. controlled
D. controller 12. A. to
B. for
C. on
D. in
13. A. as for
B. as to
C. as
D. for
14. A. acquiring B. requiring
C. sustaining
D. retaining
15. A. actual
B. realistic
C. realizing
D. true
16. A. except
B. except for
C. apart from
D. but
17. A. replenished
B. replaced
C. replicated
D. reposed
18. A. electronic
B. electric
C. electricity
D. electron
19. A. program
B. programmable
C. programmed
D. programming
20. A. resurrect
B. reproduce
C. resuscitate
D. resume
ADBBD CDACB CACAB DCADB
Painting, the execution of forms and shapes on a surface by means of pigment, has been continuously practiced by humans for some 20,000 years. Together with other activities (1_____ ritualistic in origin but have come to be designated as artistic (such as music or dance, painting was one of the earliest ways in which man (2_____ to express his own personality and his (3_____ understanding of an existence beyond the material world. (4_____ music and dance, however, examples of early forms of painting have survived to the present day. The modern eye can derive aesthetic as well as antiquarian satisfaction (5_____ the 15,000-year-old cave murals of Lascaux -- some examples
(6_____ to the considerable powers of draftsmanship of these early artists. And painting, like other arts, exhibits universal qualities that (7_____ for viewers of all nations and civilizations to understand and appreciate.
The major (8_____ examples of early painting anywhere in the world are found in Western Europe and the Soviet Union. But some 5,000 years ago, the areas in which important paintings were executed (9_____ to the eastern Mediterranean Sea and neighboring regions. (10_____, Western shared a European cultural tradition
-- the Middle East and Mediterranean Basin and, later, the countries of the New World.
Western painting is in general distinguished by its concentration (11_____ the representation of the human (12_____, whether in the heroic context of antiquity or the religious context of the early Christian and medieval world. The Renaissance (13_____ this tradition through a (14_____ examination of the natural world and an investigation of balance, harmony, and perspective in the visible world, linking painting (15_____ the developing sciences of anatomy and optics. The first real (16_____ from figurative painting came with the growth of landscape painting in the 17th and 18th centuries. The
landscape and figurative traditions developed together in the 19th century in an atmosphere that was increasingly (17_____ "painterly" qualities of the (18_____ of light and color and the expressive qualities of paint handling. In the 20th century these interests (19_____ to the development of a third major tradition in Western painting, abstract painting, which sought to (20_____ and express the true nature of paint and painting through action and form. 1.
A. may have been
B. that may have
C. may have
D. that may have been
2.
A. seek
B. sought
C. seek for
D. sought for
3.
A. emerging
B. emergency
C. merging
D. merger
4.
A. As
B. Unlike
C. Like
D. Since
5.
A. from
B. to
C. into
D. for
6.
A. ratify
B. testify
C. certify
D. gratify 7.
A. make easy
B. make it easy
C. make hard
D. make it hard 8.
A. extinct
B. extent
C. extant
D. exterior 9.
A. had shifted
B. have shifted
C. shifting
D. shifted 10.
A. Nevertheless
B. Moreover
C. However
D. Therefore 11.
A. to
B. in
C. on
D. for
12.
A. figure
B. shape
C. shadow
D. form
13.
A. extracted
B. extended
C. extorted
D. extruded 14.
A. closing
B. close
C. closed
D. closure
15.
A. on
B. for
C. in
D. to
16.
A. break
B. breakage
C. breakdown
D. breaking 17.
A. concerned with
B. concerning
C. concerning with
D. concerned for 18.
A. reaction
B. action
C. interaction
D. relation 19.
A. distributed
B. attributed
C. contributed
D. construed 20.
A. discover
B. uncover
C. recover
D. cover
1.D
2. B
3. A
4. B
5. A
6. B
7. B
8. C
9. D 10. D 11. C 12. A 13. B 14. B 15. D
16. A 17. A 18. C 19. C 20. B
Aesthetic thought of a distinctively modern bent emerged during the 18th century. The western philosophers and critics of this time devoted much attention to such matters (1_____ natural beauty, the sublime, and representation -- a trend reflecting the central position they had given to the philosophy of nature. (2_____ that time, however, the philosophy of art has become ever more (3_____ and has begun to (4_____ the philosophy of nature. Various issues (5_____ to the philosophy of art have had a (6_____ impact (7_____ the orientation of 20th-century aesthetics. (8_____ among these are problems relating to the theory of art as form and (9_____ the distinction between representation and expression. Still another far-reaching question has to do with the value of art. Two opposing theoretical positions (10_____ on this issue: one holds that art and its appreciation are a means to some recognized moral good, (11_____ the other maintains that art is intrinsically valuable and is an end in itself. Underlying this whole issue is the concept of taste, one of the basic concerns of aesthetics. In recent years there has also been an increasing (12_____ with art as the prime object of critical judgment. Corresponding to the trend in contemporary aesthetic thought, (13_____ have followed (14_____ of two approaches. In one, criticism is restricted to the analysis and interpretation of the work of art. (15_____, it is devoted to articulating the response to the aesthetic object and to (16_____ a particular way of perceiving it.
Over the years, aesthetics has developed into a broad field of knowledge and inquiry. The concerns of contemporary aesthetics include such (17_____ problems as the nature
of style and its aesthetic significance; the relation of aesthetic judgment to culture; the (18_____ of a history of art; the (19_____ of Freudian psychology and other forms of psychological study to criticism; and the place of aesthetic judgment in practical
(20_____ in the conduct of everyday affairs.
1.
A. for
B. as
C. to
D. with
2.
A. Since
B. For
C. As
3.
A. promotional
B. promissory
C. promiscuous
D. prominent 4.
A. plant
B. supplant
C. transplant
D. replant 5.
A. central
B. concentrating
C. focusing
D. centering 6.
A. marking
B. remarking
C. marked
D. remarked 7.
A. on
B. for
C. in
D. to
8.
A. Forebodying
B. Foremost
C. Forethoughtful
D. Foregone 9.
A. for
B. for
C. to
D. on
A. have brought
B. have been brought
C. have taken
D. have been taken 11.
A. whereas
B. wherein
C. whereon
D. wherefore
12.
A. preoccupancy
B. preoccupation
C. premonition
D. preoption
13.
A. artists
B. writers
C. critics
D. analysts
14.
A. all
B. either
C. neither
D. none
15.
A. In the other manner
B. In the other way
C. In another
D. In the other
16.
A. justify
B. justified
C. justifying
D. having justified 17.
A. diverse
B. divided
C. divine
D. dividual
18.
A. vicinity
B. viability
C. villainy
D. visibility
19.
A. reliance
B. reliability
C. relief
D. relevancy
20.
A. reason
B. reasonableness
C. reasoning
D. reasonability
1. B
2. A
3. D
4. B
5. A
6. C
7. A
8. B
9. C 10. D 11. A 12. B 13. C 14. B 15. D 16.
C 17. A 18. B 19.
D 20. C
小学四年级英语完型填空练习题 Passage 1 room. It’s 1 room. There are two maps 2 the wall. One is a map 3 This is Peter’s a desk in front of (在……前面) the China, the other is a map 4 the world(世界). There’s a glass. There 7 some tea in it. window. There’s a clock 5 it. Near the 6 there’s There are two pens and some books 8 the desk , too. On the floor there’s a chair and a football under it. Peter studies 9 his room and he10 his room very much. ( )1.A. a quite nice B. a very nice C. very a nice ( )2.A. on B. to C. in ( )3.A. on B. of C. at ( )4.A. in B. near C. of ( )5.A. in B. on C. under ( )6.A. desk B. clock C. window ( )7.A. are B. is C. am ( )8.A. in B. on C. behind ( )9.A. in B. of C. near ( )10.A. like B. looks like C. likes Passage 2 Jim and Bill are 1 .They are 2 twelve. They are American and they are in the same class 3 their school. 4 Li is 5 English teacher. He is a good 6 . They love 7 very much. They have two good 8 . 9 names are Lucy and Lily. They are 10 . ( )1.A. teachers B. workers C. students D. twin ( )2.A. both B. all C. too D. two ( )3.A. at B. in C. of D. to ( )4.A. Mr B. Mrs C. Miss D. Teacher ( )5.A. a B. an C. their D. they ( )6.A. worker B. teacher C. father D. mother ( )7.A. her B. his C. he D. him ( )8.A. friends B. students C. brothers D. sisters ( )9.A. Their B. Our C. They D. They’re ( )10.A. all American B. American girl C. America D. American teachers Passage 3 Kate 1 John are students. They are in 2 Three. Kate is in Class Four. And John 3 in Class Two. 4 are forty-five students in Kate’s class. Twenty-five students 5 boys. There are fifty students in Jim’s 6.Twenty-eight students are girls. They go to 7 at seven in the 8 , and go 9 at three in the 10 . ( )1.A. or B. and C. with
2015英语专四词汇语法模拟题练习及答案解析（一） 2015年英语专业英语四级考试已进入冲刺阶段，适当做些模拟练习题有助于同学们在考前着重复习自己的弱项，希望百度文库整理的2015英语专四词汇语法模拟题练习及答案解析能给同学们带来帮助。 1.____in the past, at the moment it is a favorite choice for wedding gown. A. Unpopular has as white been B. White has been as unpopular C. Unpopular has been as white D. Unpopular as white has been 2.____for a long time, the fields are all dried up. A. There has been no rain B. Having no rain C. There having been no rain D. There being no rain 3. The millions of calculations involved, ____by hand, would have lost all practical value by the time they were finished. A. had they been done B. they had been done C. having been done D. they were done 4. Televisions enable us to see things happen almost at the exact moment____. A. which they are happening B. they are happening C. which they happen D. they have happened 5.____me most was that the young boy who had lost both arms in an accident could handle a pen with his feet. A. That amazed B. It amazed C. Which amazed D. What amazed
TEST FOR ENGLISH MAJORS —GRADE FOUR— MODEL TEST ONE PART I DICTATION [10 MIN] Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be done at normal speed, listen and try to understand the meaning. For the second and third readings, the passage will be read sentence by sentence, or phrase by phrase, with intervals of 15 seconds. The last reading will be done at normal speed again and during this time you should check your work. You will then be given 2 minutes to check through your work once more. Please write the whole passage on ANSWER SHEET ONE. PART II LISTENING COMPREHENSION [20 MIN] SECTION A TALK In this section you will hear a talk. You will hear the talk ONCE ONLY. While listening, you may look at the task on the ANSWER SHEETONE and write NO MORE THAN THREE WORDS for each gap. Make sure what you fill in is both grammatically and semantically acceptable. You may use the blank sheet for note-taking. You have THIRTY seconds to preview the gap-filling task. Now, listen to the talk. When it is over, you will be given TWO minutes to check your work. SECTION B CONVERSATIONS In this section, you will hear two conversations. At the end of the conversion, five questions will be asked about what was said. Both the conversation and the questions will be spoken ONCE
精品文档 英语专业四级完型填空题 Cloze -- Passage 1 Academy Award nominees who go home empty-handed may not have a shiny Oscar to show off, but they may turn out to be the bigger winners in the game of life. According to a study published in British Medical Journal on December 21, Oscar-winning screenwriters are more successful, more productive, and more ____1____ than losing nominees; however, they die sooner by about four years. Because success is usually linked to better health, his is the first ____2____ever that success is not associated with improved ____3____, says Donald Redelmeier, lead author of the study. Researchers ____4____down information about every person who was ever nominated for an Oscar since the awards were first handed out 73 years ago. To explain the ____5____findings, he offers two theories. The first is the work-to-death hypothesis. According to Redelmeier, screenwriters are more ____6____to lead unhealthy lifestyles, meaning they smoke more, exercise less, and work a lot of late-night hours, which translates into not enough sleep. Screenwriters don't have a boss to report to, which brings into ____7____Redelmeier's second explanation, the party-hearty hypothesis. When you become a successful screenwriter, you gain status without daily accountability, and as a ____8____your success may lead you to more alcohol, more parties, and more obesity, he says. Redelmeier hopes his study will ____9____how important it is to lead a healthy lifestyle. The bottom line, he says, is that greater success may ____10____lead to worse health if people fail to look after themselves. A) longevity B) flourish C) apt D) sometimes E) tracked F) respected G) account H) miracle I) occupation J) puzzling K) stress L) consequence M) internal N) fairly O) restrained Cloze -- Passage 2 Many people wonder why some men want to live on the moon. It is ____1____ not the
阅读理解，短文填空与完形填空检测卷 一.阅读短文,判断正(T)误(F)。 (A) Hi! I'm Mike. I'm ten years old. This is my grandpa．He likes beef. He is a driver. This is my uncle. He is tall and thin. He likes noodles. He is a cook. This is my sister. She is three. She is cute. She likes fish. I am a student. I like vegetables. ( )1．His grandma is a driver. ( )2．His uncle is tall and thin. ( )3. His sister is cute. ( )4．Mike is three years old. He likes fish. ( )5．Mike is 10 years old. He is a pupil. (B) My name is John. I'm 11．I'm a quiet boy. I have a friend. His name is Tom. He's 12．He has black glasses. He is tall and thin. He has short hair and big eyes. He is very friendly. We are good friends. ( )1．Tom is 12 years old. ( )2．John is a friendly boy. ( )3. Tom has green glasses and a big bag. ( )4. Tom is quiet. ( )5．They are good friends. 二、根据短文内容，选择正确的答案。
PART II CLOZE Decide which of the choices given below would correctly complete the passage if inserted in the corresponding blanks. Mark the correct choice for each blank. In the morning it starts to rain. It was the first rain of the new year and it (26)____, in an extremely violent manner, the beginning of the rainy season. The drops which fell were large, and they fell straight down, for (27)____ tropical rains never degenerate into slanting drizzle, the familiar (28)____ of a rainy day in so many other parts of the world. The rain fell heavily, it fell continuously and it saturated everything which lay (29)____ its way. During the rain most people kept to their homes. But a few walked about, (30)____ to the wetness of their clothes and determined to (31)____ as usual. And, for those who wished to keep dry however much it cost them, there were always (32)____ taxis. They splashed by along the road, with the windscreen wipers revealing only (33)____ glimpses of the drivers peering faces. (34)____, when the rain had started, the drivers had had only the big puddles to miss, but later on, then the drains had overflowed and the whole road swam with water all dangerous pits and (35)____ had been hidden, and the faces peering through the windscreens peered even more anxiously than before. But often the faces inside the taxi ceased to (36)____ to look out at all, for water had splashed up to the electrical system, and the engine stopped just as surly and abruptly as it would have done, (37)____ the car actually (38)____ into out of the drains it had so (39)____ missed only a few moments (40)____. 26. A) exhibited B) marked C) showed D) identified 27. A) brutal B) intense C) wild D) fierce 28. A) pattern B) style C) model D) norm 29. A) on B) at C) in D) over 30. A) resigning B) to resign C) resigned D) having resigned 31. A) carry on B) keep on C) continue D) go on 32. A) / B) the C) many D) some 33. A) fragmentary B) sudden C) partial D) scattered 34. A) Initially B) Originally C) Formerly D) Firstly 35. A) destructions B) frustrations C) constructions D) obstructions 36. A) disturb B) intend C) bother D) worry 37. A) was B) were C) had D) has 38. A) skidded B) swerved C) slipped D) glided
2013英语专业四级真题语法、完型填空题及解析 【完形填空原文】 Everyone knows that taxation is necessary in a modern state: Without it, it would not be possible to pay the soldiers and policemen who protect us；nor the workers in government offices who look after our health, our food, our water, and all the other things that we cannot do for ourselves；nor the ministers and members of parliament(国会) who govern the country for us. By means of taxation, we pay for things that we need just as much as we need somewhere to live and something to eat. But everyone knows that taxation is necessary, different people have different ideas about how taxation should be arranged. Should each person have to pay a certain amount of money to the government each year? Or should there be tax on things that people buy and sell? If the first kind of taxation is used, should everyone pay the same tax, whether he is rich or poor? If the second kind of tax is preferred, should everything be taxed equally? In most countries, a direct tax on persons, which is called income tax, exists. It is arranged in such a way that the poorest people pay nothing, and the percentage of tax grows greater as the taxpayer’s income grows. In England, for example, the tax on the richest people goes up as high as ninety-five percent! But countries with direct taxation nearly always have indirect taxation too. Many things imported into the country have to pay taxes or “duties”. Of course, it is the men and women who buy these imported things in the shops who really have to pay the duties, in the form of higher prices. In some countries, too, there is a tax on things sold in the shops. If the most necessary things are taxed, a lot of money is collected, but the poor people suffer most. If unnecessary things like jewels and fur coats are taxed, less money is got but the tax is fairer, as the rich pay it. Probably this last kind of indirect tax, together with a direct tax on incomes which is low for the poor and high for the rich, is the best arrangement. 【语法题真题及解析】 51. Facing the board of directors,he didn't deny __________ breaking the agreement. A. him B. it C. his D. its 解析：本题考查动名词的逻辑主语。动名词可以有自己的逻辑（意义）主语，一般可以用名词所有格Tom‘s，代词宾格如him（口语），书面语情况下一般用物主代词his，their。本题选C，但我还是要吐槽，因为根本就不需要多此一举添加his, he didn't
人教版四年级英语下册完形填空练习题 根据对话，用首字母填空，单词不能重复使用。 A篇 Kate: Excuse me. What's this in English? Sue: It's an a_____1_______. Kate: And what's this? Sue: It's an e_____2_______. It's purple. Kate: Look, I have four p____3____ and e_____4_____ t_____5____ What about you? Sue: I have t____6____ o_____7____ and s____8____ p____9_____. Kate: What's that in English? Sue: I know! It's a yellow boat. Kate: Are you sure? Sue: Yes! Kate: Look! Sue: Oh, no! It's a b_____10_____. 1.__________ 2.__________ 3.__________ 4.__________ 5.__________ 6.__________ 7.__________ 8.__________ 9.__________10,__________ B篇 Li Yan: Hi, Mimi! What's your number? Mimi: I'm number s___1___. Li Yan: What's o___2___ and n___3___? Mimi: It's t___4___. Li Yan: That's right! And what's t___5___ and f___6___? Mimi: It's s___7___. Li Yan: What's t___8___ and f___9___? Mimi: It's e___10___. Li Yan: Good! Mimi: Yeah! 1.__________ 2.__________ 3.__________ 4.__________ 5.__________
一四级英语每日练习 Passage 1 It is well known that teenage boys tend to do better 1)______ math than girls, that male high school students are more likely than their female counterparts 2)______ advanced math courses like calculus, that virtually all the great mathematicians 3)______ men. Are women born with 4)______ mathematical ability? Or does society's sexism slow their progress? In 1980, two Johns Hopkins University researchers tried 5)______ the eternal nature/nurture debate. Julian Stanley and Camilla Benbow 6)______ 10,000 talented seventh and eighth graders between 1972 and 1979. Using the Scholastic Aptitude Test, in which math questions are meant to measure ability rather than knowledge, they discovered 7)______ sex differences. 8)______ the verbal abilities of the males and females 9)______ differed, twice as many boys as girls scored over 500 (on a scale of 200 to 800) on mathematical ability; at the 700 level, the ratio was 14 to 1. The conclusion: males have 10)______ superior mathematical reasoning ability. Benbow and Stanley's findings, 11)______ were published in "Science", disturbed some men and 12)______ women. Now there is comfort for those people in a new study from the University of Chicago that suggests math 13)______ not, after all, a natural male domain. Prof. Zalman Usiskin studied 1,366 tenth graders. They were selected from geometry classes and tested on their ability to solve geometry proofs, a subject requiring 14)______ abstract reasoning and spatial ability. The conclusion 15)______ by Usiskin: there are no sex differences in math ability. 1. A. at B. to C. of D. about 2. A. in tackling B. tackling C. to tackle D. about tackling 3. A. might be B. have been C. must be D. had been 4. A. smaller B. less C. fewer D. not more 5. A. to settle B. to set C. settling D. setting 6. A. were tested B. have tested C. were testing D. had tested 7. A. distinct B. instinct C. remote D. vague 8. A. Since B. However C. As D. While 9. A. scarcely not B. virtually C. largely D. hardly 10. A. superficially B. universally C. inherently D. initially 11. A. as B. that C. which D. all 12. A. few B. not a few C. not few D. quite few 13. A. be B. were C. was D. is 14. A. none of B. neither of C. either D. both 15. A. got B. gained C. reached D. accomplished Passage 2 We all know that a magician does not really depend on "magic" to perform his tricks, but on his ability to act at great speed. 16)______, this does not prevent us from enjoying watching a magician 17)______rabbits from a hat. 18)______ the greatest magician of all time was Harry Houdini who died in 1926. Houdini mastered the art of 19)______. He could free himself from the tight test knots or the most complicated locks in seconds. 20)______ no one really knows how he
Unit 1 Passage 1 I am 1 girl. I am twelve. I am 2 school. 3 name is Zhang Hua. I am in 4 .I am 5 Row Five. Jim is 6 English boy. He is eleven. He and I 7 in the same class. He is my friend . We 8 good friends. 9 is my teacher, Miss Gao. 10 is a good teacher. ( )1.A. an B. the C. × D. a ( )2.A. at B. in C. and D. or ( )3.A. I B. My C. He D. Y ou ( )4.A. Graed One, Class One B. grade one, class one. C. Class One, Grade One D. class one , grade one ( )5.A. at B. or C. in D. and ( )6.A. an B. a C. the D. × ( )7.A. is B. am C. be D. are ( )8.A. are B. am C. is D. be ( )9.A. What B. This C. He D. Y ou ( )10.A.He B. I C. She D. Y ou Passage 2 Today we have 1 new students in 2 school. 3 are Chinese. 4 names are Liu Mei and Liu Fang. 5 twins. They 6 the same. 7 in Class One, Grade One. 8 is Liu Mei? 9 is Liu Fang? Oh, they are over 10 . ( )1.A. one B. two C. three D. four ( )2.A. my B. your C. our D. we ( )3.A. they B. we C. They D. We ( )4.A.They B. My C. His D. Their ( )5.A. They’re B. He’s C. We D. Their ( )6.A. see B. look C. is D. are ( )7.A. We B. Its C. They’re D. These ( )8.A. She B. That C. He D. Who ( )9.A.Who B. He C. She D. That ( )10.A. here B. at C. there D. in Passage 3 Jim Green and I 1 twin brothers. We are 2 .Lucy King is 3 English gir l . We’re in the same 4 . She is eleven. 5 are twelve. We’re good friends and 6 . Our Chinese 7 is Miss Gao. She’s a nice teacher. We all 8 her. ( )1.A. am B. is C. are D. be ( )2.A. America B. American C. America D. american ( )3.A. a B. an C. the D. × ( )4.A. class B. classes C. Class D. Classes ( )5.A. I B. He C. They D. We ( )6.A. classmate B. a classmate C. classmates D. a classmates ( )7.A. teacher B. student C. teachers D. students ( )8.A. are B. love C. put D. see
Flight simulator (飞行模拟器 refers to any electronic or mechanical system for training airplane and spacecraft pilots and crew member by simulating flight conditions. The purpose of simulation is not to completely substitute (1 actual flight training but to thoroughly familiarize students with the vehicle (2 before they (3 extensive and possibly dangerous actual flight training. Simulations also is useful for review and for familiarizing pilots with new (4 to existing craft. Two early flight simulators appeared in England within a decade after the first flight of Orville and Wilbur Wright. They were designed to enable pilots to simulate simple aircraft (5 in three dimensions, nose up or down; left wing high and right low, or vice versa; and (6 to left or right. It took until 1929, however , for a truly effective simulator, the Link Trainer, to appear, devised by Edwin A. Link, a self-educated aviator and inventor from Binghamton , New York. (7 airplane instrumentation had been developed sufficiently to permit "blind" flying on instruments alone, but training pilots to do so involved (8 risk. Link built a model of an airplane cockpit equipped (9 instrument panel and controls that could realistically simulate all the movements of an airplane. Pilots could use the device for instrument training, manipulating the controls (10 instrument readings so as to maintain straight and level flight or (11 climb or descent with no visual reference (12 any horizon except for the artificial one on the instrument panel. The trainer was modified (13 aircraft technology advanced. Commercial airlines began to use the Link Trainer for pilot training, and the US government began purchasing them in 1934, (14 thousands more as World War II approached. Technological advances during the war, particularly in electronics, helped to make the flight simulator increasingly (15 The use of efficient analog computers in the early 1950s led to further improvements. Airplane cockpits , controls , and instrument displays had by then become so inpidualized that it was no longer feasible to use a generalized trainer to prepare pilots to fly anything (16 the simplest light planes. By the 1950s , the US Air Force was using simulators that precisely (17 the cockpits of its planes. During the early 1960s (18 digital and hybrid computers were adopted , and their speed and