de cuong on tap de thi tieng anh hoc ki 2 lop 10

7 413 2
de cuong on tap de thi tieng anh hoc ki 2 lop 10

Đang tải... (xem toàn văn)

Thông tin tài liệu

de cuong on tap de thi tieng anh hoc ki 2 lop 10 tài liệu, giáo án, bài giảng , luận văn, luận án, đồ án, bài tập lớn về...

Sở Giáo dục & Đào Tạo Đồng Tháp Đề thi học kỳ 2 môn Tiếng Anh Năm học: 2007-2008 Thời gian làm bài: 45 phút (không kể thời gian phát đề) Ī.Vocabulary and Grammar.(3.75p) A. Choose the word whose underline part in pronounced differently from the other. 1. A.grabbed B.stopped C.received D.played 2. A.Russia B.occupy C.wonder D.accompany B. Choose the word that has different stress pattern from the others. 3. A.waterfall B.wilderness C.improvement D.practical 4. A.condition B.scenery C.spectator D.decision C. Coose the word or phrase which best completes each sentence 5. You will become ill you stop working too hard. A.until B.when C.unless D.if 6.the three friends all for the same job. A.requested B. applied C. intended D. referred 7. his parents never allowed him A. smoke B. smoking C. to smoke D. smokes 8. she will spend at least one year working abroad . she can find out how things operate overseas . A. because B. so as to C. so that D.so long as 9. she gave her children everything .they want A that B . who C.whom D. what 10. the woman . is sitting at the desk is the MC A. who B whose C. where D. which 11. I can't think of the reason he failed the exams A whose B. why C. that D. which 12. Jane, . mother is a physician , is very good at biology A. who B.whose C which D. that 13.Do you know the shop Andrew picked me up? A. which B . whoes C where D. that 14. experence is really an advantage to get this job A. realistic B. real C.practice D.practical 15. whatever the latest fashion , she still keeps her clothing style A. trend B. way C. manner D.style П. choose the preposition which best completes each sentence 16. she belives the she can commune God in prayer A. with B. to C. in D. by 17. I'm thoroughly dissatisfied . your job A. by B. for C.over D. with \ 18. the plans were faxed .by our New York office A. for B. to C. through D. from 19. this was sent .fax A. through B.to C. by D. out of 20. which journals do you subscribe .? a. to B. for C. over D. with ш. Rewrite the sentence in such a way that it means almost the same as the sentence printed before it 21. the boy hit the dog in the garden  it was the boy 22. he met his wife in Britain  it was in Britain . 23. Tom was late. so was Ann  Both Tom . 24. she didn't write and she didn't phone  she neither . 25. the song was interesting. we listened to it last night  The song to ANSWER 1.C 2.B 3.C 4.B 5.C 6.B 7.C 8.C 9.A 10.A 11.B 12.B 13.C 14.D 15.A 16.A 17.D 18.B 19.C 20.A 21. It was the boy who hit the dog in the garden 22.It was the Britain the he met his wife 23. both Tom and Ann were late 24. she neither wrote nor phoned 25. the song to which we listen last night was interesting. THE END. GOOD LUCK TO YOU. Trường em http://truongem.com ĐỀ CƯƠNG ÔN TẬP THI KỲ MÔN TIẾNG ANH LỚP 10 I Cấu trúc đề thi: Tổng cộng 40 câu thời gian 45 phút - Ngữ âm: câu - Từ vựng, ngữ pháp: 20 câu - Đọc hiểu: 10 câu (Gồm: điền từ trả lời câu hỏi) - Viết: câu (Gồm: tìm lỗi sai viết lại câu) II Nội dung ôn tập: Từ Unit đến Unit 16 Unit9: A Reading: Task1 B Speaking: Task1,2 C Listening: words in the Listen and Repeat part D Writing: vocabulary E Language Focus: - Pronunciation: /i@/, /e@/, /U@/ - Should (not) + bare infinitive V - Conditional sentence type 1, Unit10: A Reading: Task1 C Listening: words in the Listen and Repeat part D Writing: Task1 E Language Focus: - Pronunciation: /b/, /p/ - The passive voice Unit11: A Reading: Task1 B Speaking: Task1,2 C Listening: words in the Listen and Repeat part D Writing: Task1 E Language Focus: - Pronunciation: /t/, /d/ - Conditional sentence type 1,2,3 Unit12: A Reading: Task1 B Speaking: Task2 E Language Focus: - Pronunciation: /s/, /z/ - TO + infinitive - Wh- questions Unit13: A Reading: Task1 B Speaking: Task1,2,3 E Language Focus: - Pronunciation: /f/, /v/ - Adjectives of attitude - It (be) not until … that … - Articles (a, an, the, and no articles) Unit14: A Reading: Task1 Trường em Unit16: http://truongem.com B Speaking: Task2,3 C Listening: words in the Listen and Repeat part E Language Focus: - Pronunciation: /g/, /k/ - will vs going to A Reading: Task1 E Language Focus: - Pronunciation: /Z/, /S/, - Comparatives and superlatives Trường em http://truongem.com III Đề thi mẫu Điền vào chỗ trống đánh số từ cụm từ thích hợp tương ứng chữ (A,B,C D) từ câu đến câu Conservation is the safeguarding and preservation of natural resources, so that they can continue (1) and enjoyed In the past, most people believed that the world/s (2) could never be used up Today, we know that (3) is not true An important part of conservation is the prevention of waste- waste of forests, soil, wildlife, minerals and human lives As important is the fight (4) .pollution of our .(5) , in particular, the dirtying and poisoning of air and water Câu 1: A to use B being used C to be used D used Câu 2: A resources B supplies C gases D diamonds Câu 3: A which B this C that D there Câu 4: A for B against C to D on Câu 5: A.Earth B neighborhood C environment D.surroundings Xác định từ cụm từ có gạch cần phải sửa để câu trở thành xác: Câu 6: If I (A)hadn’t stayed up late last (B)night, I (C)wouldn’ t (D)have be tired Câu 7: I (A)don’t think children (B)should not spend (C)too much time (D)playing computer games Câu 8: (A)Many species of (B)plants and animals are in (C)dangerous of (D)extinction Đọc kỹ đoạn văn sau chọn phương án (ứng với A,B,C D) cho câu từ câu đến câu 12 The major international competition in football is the World Cup, organized by FIFA This competition takes place over a four-year period More than 190 national teams compete in qualifying tournaments The final tournaments, which is held every four years, now involves 32 national teams, increased in 1998 from the 24 of 1994, competing a four-week period The 2006 FIFA World Cup took place in Germany and in 2010 it will be held in South Africa There has been a football tournament at every Summer Olympic Games since 1900, except at the 1932 Games in Los Angeles Before the inception of the World Cup, the Olympics, especially during the 1920s, had the same status as the World Cup Originally, the event was for amateurs only, however, since the 1984 Summer Olympics professionals have been permitted as well, with certain restrictions which effectively prevent countries from fielding their strongest side Câu 9: The World Cup …………………………………… A is organized by FIFA and takes place only a four-year period B is not organized by FIFA and takes place a four-year period C is organized by FIFA and takes place over a four-year period Trường em http://truongem.com D is organized by FIFA and takes place a four – period year Câu 10: It was not until 1998 that the World Cup began to involve ………….national teams A more than 24 B 24 C less than 32 D 32 Câu 11: Which sentence is NOT true? A The 2006 FIFA World Cup took place in Germany B In 2010 the World Cup will be held in South Africa C The World Cup takes place over a four-year period D There was a football tournament at the 1932 Olympic Games in Los Angeles Câu 12: It was not until………that professional footballers could take part in the Olympics A 1990 B 1920 C 1932 D.1984 Câu 13: Is the football tournament considered the main event at every Summer Olympic Games A Yes, it is B No, it isn’t C It depends on the organizers D There is no information for it Chọn từ/ cụm từ thích hợp (ứng với A, B, C D) để hoàn thành câu sau: Câu 14 If I did not want to go to the party, I go A not B did not C will not D would not Câu 15 There is not …… hotel near where I live ……… nearest hotel is 10 miles away A the/A B a/The C the/The D the/An Câu 16: Lots of abandoned animals of in the Orphanage A take care B are taking care C are taken care D care ...A. Choose the best answer A, B, C or D for each sentence: 1. The bridge is a marvelous work of engineering and _______. A. destroy B. destruction C. destructive D. destructively 2. Work on the production line is monotonous and lacks _______. A. variety B. various C. varied D. variable 3. He owns a series of _______ across the US and beyond. A. industries B. industrials C. industrious D. industrialize 4. He says he'll tell the authorities but it's just an empty ______. A. threat B. threaten C. threatening D. threateningly 5. I'm sick of _______-heart liberal politicians. A. blood B. bloody C. bleed D. bleeding 6/ In the movie, he plays a concerned and _______ father trying to bring up two teenage children on his own. A. sense B. sensitive C. sensible D. senseless 6. As a child I had an _______ friend called Polly. A. image B. imagine C. imaginative D. imaginary 7. Phone me if there are any new _______. A. develop B. developed C. developing D. developments 8. If you don't have anything _______ to say, I'd rather you kept quiet. A. construct B. constructors C. constructive D. construction 9. A healthy body will be able to fight off the illness _______ without the use of medicine. A. nature B. natural C. naturalize D. naturally 10. He's a very _______ dresser - he always looks like he's wearing his father's clothes! A. conserve B. conservative C. conservation D. conservatism 11. Dolphins are a _______ species (= it is illegal to harm or kill them). A. protected B. protection C. protective D. protectively 12. He has a limited _______ of French. A. know B. knowable C. knowledge D. knowing 13. His father was working _______ at his desk. A. industry B. industrial C. industrious D. industriously 14. Such data will prove _______ for researchers. A. value B. valued C. valuable D. invaluable 15. Representatives of the company claim their plan will be _______ to local needs. A. sense B. sensitive C. sensible D. senseless 16. The program traced the _______ of popular music through the ages. A. develop B. developed C. developing D. development 17. Inflation figures have fluctuated _______ between 0.2% and 25%. A. wildfire B. wildlife C. wild D. wildly 18. For a goalkeeper, it's a great _______ to have big hands. A. advantage B. disadvantage C. advantageous D. advantageously 19. She first rose to _______ as a singer at the age of 16. A. fame B. famed C. famous D. infamous B. Read the passage below carefully, and then choose the best answer: Conservation conflicts arise when natural-resource shortages develop in the face of steadily increasing demands from a growing human population. Controversy frequently surrounds how a resource should be used, or allocated, and for whom. For example, a river may supply water for agricultural irrigation, habitat for fish, and water-generated electricity for a factory. Farmers, fishers, and industry leaders vie for unrestricted access to this river, but such freedom could destroy the resource, and conservation methods are necessary to protect the river for future use. Conflicts worsen when a natural resource crosses political boundaries. For example, the headwaters, or source, of a major river may be located in a different country than the country through which the river flows. There is no guarantee that the river source will be protected to accommodate resource needs downstream. In addition, the way in which one natural resource is managed has a direct effect upon other natural resources. Cutting down a forest near a river, for instance, increases erosion, the wearing away of topsoil, and can lead to flooding. Eroded soil and silt cloud the river and adversely affect many organisms such as fish and important aquatic plants that require clean, clear freshwater for survival. New vocabulary: - controversy (n.): sự tranh luận, sự tranh cải - to allocate (v.): chỉ định; cấp cho; phân phối - to vie (v.): ganh đua, thi đua - headwater (n.): thượng nguồn, Đề cương ôn tập Anh Văn 12 - HKII Trường THPT Quang Trung QN U 1 Đề cương ôn tập Anh Văn 12 - HKII Trường THPT Quang Trung QN NIT9: DESERTS ( Nguồn: http://thptquangtrung.vn/tindetail.php?id=647 ). TEST 1 I. PRONUNCIATION A. Choose the word that has the underlined part pronounced differently from that of the others. 1. a. dune b. fu nny c. hummock d. shru b 2. a. sh rub b. delic ious c. stretch d. branch 3. a. des ert b. s andy c. across d. slopes 4. a. sal t b. slo pe c. wa ter d. sho rt 5. a. my stery b. ri ver c. terri tory d. corri dor B. Choose the word that has the main stress placed differently from that of the others. 6. a. desert b. hummock c. aerial d. enormous 7. a. interpreter b. aborigines c. European d. eucalyptus 8. a. Australia b. territory c. society d. petroleum 9. a. camel b. cactus c. crocodile d. banana 10. a. scientific b. expedition c. spinifex d. geographical II. LANGUAGE FOCUS A. Choose the word or phrase - a, b, c or d - that best completes the sentence. 11. They continued their journey____the Sahara Desert. a. over b. along c. across d. throughout 12. Most of the Sahara consists ___ rocky; large sand dunes form only a minor part. a. on b. of c. on d. with 13. Dry salt lakes _____ 70 kilometers long and 15 kilometers wide lie be tween long dunes. a. to b. with c. of d. up to 14. Finally, the great expedition____for the long journey to the Sahara Desert. a. went out b. came through c. set off d. got over 15. Many people think of deserts as barren region, but many species of plants and animals have to life there. a. adapted b. survived c. altered d. reorganized 16. One report states that all of Africa could eventually become a desert. a. extreme b. magnificent c. significant d. massive 17. It has been reported that the Sahara is __ south by as much as 30 miles per year. a. expanding b. covering c. stretching d. sloping 18. The spreading of deserts is known as…………………… . a. deserting b. desertation c. desertion d. desertification 19. The highest _,____………… in the Sahara is Emi Koussi (3415 m) in the Tibesti Mountains in northern Chad. a. point b. peak c. edge d. slope 20. The land loses its protective cover of…………… and soon turns into desert. a. vegetables b. vegetative c. vegetation d. vegetal 21. A(n)______is an area of flat land that is higher than the land around it. a. dune b. slope c. oasis d. tableland 22. After three hours of climbing, we finally reached the___………… of the mountain. a. crest . b. steep c. corridor d. foot 23. Dominant____………in the Sahara are various Berber groups including Tuareg tribes. 2 Đề cương ôn tập Anh Văn 12 - HKII Trường THPT Quang Trung QN a. ethnic b. ethnicity c. ethnicities d. ethnically 24. As the clouds drifted away an even higher peak became__ to the climbers. a. in sight b. visible c. obvious d. apparent 25. The Sahara the continent of Africa into North and Sub-Saharan Africa, a. separates b. diverges c. detachs d. divides B. Choose the word or phrase - a, b, c or d - that best completes the sentences. 26. Ancient Egyptians mummified their dead through the use of chemicals, ancient Peruvians mummified their dead through natural processes by putting dead bodies in extreme dry desert caves, a. whereas b. because c. even though d. whether or not 27. The building has a smoke detector___any fires can be detected immediately. a. so that b. if c. as if d. in case 28. Not everyone is happy about the new timetable. There are, __, a number of advantages to it. a. consequently b. furthermore c. however d. moreover 29. Neither Jane nor I______to the New York before. a. was b. were c. has been d. have been 30. Only if you promise to do everything I say___you in math. a. I will tutor b. tutor c. will I tutor d. I tutor 31. There has been_____coverage of the coming election that people have got bored with it. a. too much media b. so many media c. so much media d. such a media 32. I like to keep the windows open at night no matter how Trang 1 GIÁO VIÊN: LẠI VĂN LONG ĐỀ 01 http://violet.vn/vanlonghanam ĐỀ KIỂM TRA CHẤT LƯỢNG KÌ II NĂM HỌC 2013-2014 MÔN TOÁN LỚP 10 gian làm bài: 90 phút (Không kể thời gian giao đề) Câu 1 ( 3 im ) Gii các bt phương trình sau. a) (x-2)( x 2 +5x +6 ) > 0 b) 1 10 3 772 2 2 −≤ − − ++− x x xx Câu 2 ( 1  i  m ).Tìm các giá tr  c  a m  b  t ph ươ ng trình: x 2 – m x – 3m -1 > 0 Câu 3 (1,5  i  m ) Bi  t cos ∝ = − và ( < ∝ < ). Tính sin2 α , cos2 α . Câu 4 (0.5  i  m) Ch  ng minh r  ng. a a a aa 4tan sin 7 sin 7coscos = − − Câu 5 (3  i  m)Trong m  t ph  ng t  a oxy cho  ABC v  i A ( 6; 2), B (1 ; 4), C (3 ;-1) a) Vi  t ph ươ ng trình ư ng th  ng BC và trung tuy  n BM b) Vi  t ph ươ ng trình ư ng th  ng (d)  i qua tr  ng tâm G và vuông góc v  i BC c) Tính di  n tích tam giác ABC d) Vi  tph ươ ng trình ư ng tròn  i qua 3  i  m A, B,C. Câu 6 (1  ) Trong m  t ph  ng t  a  oxy. L  p ph ươ ng trình chính t  c c  a elip (E). bi  t m  t tiêu  i  m c  a (E) là 2 F (2;0) và  i  m M(2; 3) thu  c (E). H  T Trang 2 GIÁO VIÊN: LẠI VĂN LONG ĐỀ 02 http://violet.vn/vanlonghanam ĐỀ KIỂM TRA CHẤT LƯỢNG KÌ II NĂM HỌC 2013-2014 MÔN TOÁN LỚP 10 gian làm bài: 90 phút (Không kể thời gian giao đề) A. PHẦN CHUNG (7điểm). (Dành cho tất cả các thí sinh) Câu I(2điểm). Gii bt phương trình và h bt phương trình sau: 1) 2 6 0 4 x x x + − < − 2) 2 2 2 3 2 0 5 4 0 x x x x  − + + ≥   − + >   . Câu II(1điểm).  kh  o sát k  t qu  thi tuy  n sinh môn Toán trong k ỳ thi tuy  n sinh  i h  c n ă m v  a qua c  a tr ư ng A, ng ư i  i  u tra ch  n m  t m  u g  m 100 h  c sinh tham gia k ỳ thi tuy  n sinh  ó.  i  m môn Toán (thang  i  m10) c  a các h  c sinh này ư c cho  b  ng phân b  t  n s  sau  ây:  i  m 0 1 2 3 4 5 6 7 8 9 10 T  n s  1 1 3 5 8 13 19 24 14 10 2 N = 100 Tìm m  t và s  trung v  c  a b  ng phân b  t  n s  trên. Câu III(2điểm). 1) Tính các giá tr  l ư ng giác c  a góc , α bi  t sin α = 5 4 và . 2 π α π < < 2) Ch  ng minh r  ng: cot α − tan α = 2cot2 α Câu IV(2điểm). Trong m  t ph  ng Oxy cho hai  i  m A (1 ; 0) và B (-2 ; 9). 1) Vi  t ph ươ ng trình t  ng quát c  a ư ng th  ng ∆  i qua hai  i  m A và B . 2) Vi  t ph ươ ng trình ư ng tròn (C) có tâm I (2 ; 7) và ti  p xúc v  i ư ng th  ng . ∆ B. PHẦN RIÊNG (3điểm). (Thí sinh học chương trình nào thì làm theo chương trình đó) 1. Theo chương trình cơ bản. Câu Va(2điểm). 1) Gi  i b  t ph ươ ng trình 2 5. x − < 2) Tìm m  bi  u th  c 2 2 ( ) 2( 2) 0 f x x m x m = − − + > , v  i . x ∀ ∈ R. Câu VIa(1điểm). Tìm ta  các tiêu im, các nh ;  dài trc ln, trc bé ca elip (E): 2 2 4 25 100. x y+ = 2. Chương trình nâng cao. Câu Vb(2điểm). 1) Gii bt phương trình 2 10 21 3. − + − < − x x x 2) Cho phương trình x 2 - 2(m-1)x + 2m 2 - 5m + 3 = 0. Tìm m  phương trình có hai nghim dương phân bit. Câu VIb(1điểm). 1) Vit phương trình chính tc ca hypebol (H) bit tâm sai e = 2, các tiêu im ca (H) trùng vi các tiêu im ca elip (E): 2 2 1. 25 16 x y + = 2) Tìm  i  m M trên (H) sao cho 1 2 2 MF MF = . H  T Trang 3 GIÁO VIÊN: LẠI VĂN LONG ĐỀ 03 http://violet.vn/vanlonghanam ĐỀ KIỂM TRA CHẤT LƯỢNG KÌ II NĂM HỌC 2013-2014 MÔN TOÁN LỚP 10 gian làm bài: 90 phút (Không k ể thời gian giao đề) Câu 1: Gii bt phương trình sau: a) 2 1 ( 3) 3 x x x ≥ + + b) 2 2 6 5 4 32 64 x x x x − + − ≤ − + Câu 2: Gii các phương trình sau: a. 2 21 4 3 x x x − − = + b. 2 2 3 2 2 4 x x x x + + = + Câu 3: Tìm iu kin ca m  bt phương trình sau : mx 2 – 2(m – 2 )x + m – 9 > 0 có nghim úng vi mi x thuc R. Câu 4: a) Tìm các Xuan Dinh high school The second- semester examination for grade 10 students School year :2010-2011 Time allowed : 45 Full name:……………… Class:……………… SBD:……………………… Pronunciation Choose the word that has the underline part pronounced differently from that the others A hunt B sunny C furious D gulf A musician B difficult C special D ocean Choose the word that whose main stress is placed differently from that of the others A trophy B promote C attract D compete A cinema B history C movement D discover Vocabulary and grammar Choose the word or pharse a,b,c,d – that best completes each sentences If it………… Next week, we will be able to planthe vegetable A rain B rained C raining D rains These children ,…………parents work late, are taken home by school bus A that B whose C who D their “ the students all went to the circus yesterday” “ I heard it was really……….” A.amused B amusing C amuse D amusingly With the victory over Germany in the final match , Brazil became team to win the…… five time A.trophy B goal C match D score We……… A special dinner tonight Would you like to come and joinus? A cooked B cooks C will cook D are going to cook Pele was famous ……………his powerful kicking ang controlling the ball A with B for C of D at Love, joy, hate, fear, and jealousy are all emotion A delights B entertainment C communications D feelings “ I’m going out for a walk Have you seen my shoes ?” “ Yes, they’re on ………floor in…….kitchen “ A a/the B the/the C a/a D a/the Complete the sentences with the appropriate form of the words in parentheses There are a lot of species which are threatened with (extinct) They are investigating the ( mystery) disappearance of a young woman Mozart and Bethoven are two of the world famous ( compose) He wantsto ( wide) his knowledge of the subject Rewrite these sentences using the words provided or suggested words in brackets She has now moved back to the house on Long Island She was born there ( where) The manager always welcomes new employees ( the passive voice) He rang the bell He wants to tell us that dinner was ready the football match didn’t start until the lights were on It was not until……………………………………………… I don’t live in a big city , so I can’t go to the cinema very often( conditional sentences type 2) She was successful She felt dissatisfied.( in spite of) Speaking Choose the most appropriate questions that best complete the conversation Nam: (1)………………………………………………………………… Ba: No, I don’t like them very much I think there’re so violent Nam: (2)………………………………………………………… Ba: Well, I like romantic films and science fiction films Nam: (3) ……………………………………………………… Ba: Well, it’s difficult to say.But I suppose I prefer romantic films Nam: ( 4)…………………………………………………… Ba: Julia Robert I really like her Nam: She ‘s OK But my favorite actor is Mel Gibson Ba: Great! A: Do you like romantic film B Do you like action film C Which film you like ? D How you like action film A What film you like best ? B Wgat wiuld you like ? C What kind of film you llike ? D What kind of film you like? A Do you prefer romantic films or science fiction fims? B Which you like best : romantic films or science fiction fims? C Which you prefer: romantic films or science fiction fims? D Do you like romantic films or science fiction fims? A Who is your favorite actress? C Which actress you like best B Who are the best actress? D What is your favorite actress? Reading Read the passage carefully then choose the best answer for each blank Organized football games began in 1863 In football, two (1) of eleven players try to kick or head the ball into the goal of other team The goal keeper,(2) tries to keep the ball out of the goal, is only player on the field who can touch the ball with his or her hands The other players must use their feet, head, and bodies to (3) theball Every four year , football teams around the world (4) for the World Cup The World Cup competition started in 1930 Peaple in more than 140 countries (5) the world play football It is definitely ... television B pleasure C Asia D tense Trường em http://truongem.com Đáp án: C A B B C D B C C 10 D 11 D 12 D 13 D 14 D 15 B 16 C 17 B 18 C 19 A 20 B 21 A 22 B 23 C 24 B 25 A 26 B 27 D 28 ... not a millionaire so I cannot sụch a thing A If I was not a millionaire, I could such a thing B If I were a millionaire, I could such a thing C I could not such thing if I were a millionaire D... http://truongem.com B Speaking: Task2,3 C Listening: words in the Listen and Repeat part E Language Focus: - Pronunciation: /g/, /k/ - will vs going to A Reading: Task1 E Language Focus: - Pronunciation:

Ngày đăng: 26/10/2017, 15:53

Từ khóa liên quan

Tài liệu cùng người dùng

  • Đang cập nhật ...

Tài liệu liên quan