必修5《解三角形》(復(fù)習(xí)題)[基礎(chǔ)訓(xùn)練A組]1、在△ABC中,∠A=60°, a=, b=4, 那么滿足條件的△ABC( )A.有一個(gè)解 B.有兩個(gè)解 C.無(wú)解 D.不能確定2、在△ABC中,已知a=5, c=10, A=30°, 則∠B= ( ) A.105° B. 60° C. 15° D.105°或15°3、在△ABC中,若sinA>sinB,則A與B的大小關(guān)系為( )A.A>B B.A<B C.A≥B D.不能確定4、在△中,若,則等于( )A. B. C. D. 5、在△ABC中,已知,,,則= .6、在△ABC中,已知,,,則= .7、在△ABC中,已知,,,則= .8、在△ABC中,已知,,,則= .9、在△ABC中,已知,,,則= .10、在△ABC中,已知,則= .11、兩燈塔A,B與海洋觀察站C的距離都等于a km ,燈塔A在C北偏東30°,B在C南偏東60°,則A,B之間的相距是 km.12、在△ABC中,A∶B∶C=3∶1∶2,則a∶b∶c= .13、在△ABC中,若,,,則= .14、在△ABC中,若BC=5,CA=7,AB=8,則最大角與最小角之和是 .15、已知a=3,c=2,B=150°,求邊b的長(zhǎng)及S△ABC.[綜合訓(xùn)練B組]1、在△ABC中,根據(jù)下列條件解三角形,則其中有兩個(gè)解的是( ) A.b = 10,A = 45°,B = 70° B.a = 60,c = 48,B =100° C.a = 7,b = 5,A = 80° D.a = 14,b = 16,A = 45°2、在△ABC中,若,則其面積等于( )A. B. C. D.3、在△ABC中,若,則最大角的余弦是( )A B C D 4、已知在⊿ABC中,,則此三角形為( )A.直角三角形 B.等腰直角三角形 C.等腰三角形 D.等腰或直角三角形5、在△ABC中,,那么△ABC一定是( ) A.銳角三角形 B.直角三角形 C.等腰三角形 D.等腰或直角三角形6、在△ABC中,若,則△ABC的形狀是( )A 直角三角形 B 等邊三角形 C 不能確定 D 等腰三角形 7、△ABC的內(nèi)角A、B、C的對(duì)邊分別為a、b、c,若a、b、c成等比數(shù)列,且c=2a,則cosB=( )A. B. C. D. 8、一飛機(jī)沿水平方向飛行,在位置A處測(cè)得正前下方地面目標(biāo)C的俯角為30°,向前飛行了10000米,到達(dá)位置B時(shí)測(cè)得正前下方地面目標(biāo)C的俯角為75°,這時(shí)飛機(jī)與地面目標(biāo)的距離為 米.9、在等腰三角形 ABC中,已知sinA∶sinB=1∶2,底邊BC=10,則△ABC的周長(zhǎng)是 。
10、在△ABC中,若∶∶∶∶,則_____________ 11、在中,若,,,則 12、在平行四邊形ABCD中,已知AB=1,AD=2,,則= 13、已知銳角三角形的三邊長(zhǎng)分別為2、3、,則的取值范圍是 .14、在△ABC中,已知,求△ABC的面積.15、已知的周長(zhǎng)為,且.(1)求邊的長(zhǎng); (2)若的面積為,求角的度數(shù).[提高訓(xùn)練C組]1、△ABC中,,則等于( )A. B. C. D.2、在中,已知,其面積為,則為( )A. B. C. D.3、在中,,且邊b和c是方程的兩個(gè)根,則邊a的長(zhǎng)為( )A.2 B.3 C.4 D.5 4、在△ABC中,已知AB=4,AC=7,BC邊的中線,那么BC= .5、在△ABC中,已知,則△ABC的形狀是 .6、在ΔABC中,若SΔABC= (a2+b2-c2),那么角∠C= .7、在△ABC中,設(shè)=,求A的值.8、在中,內(nèi)角對(duì)邊的邊長(zhǎng)分別是,已知,.(Ⅰ)若的面積等于,求;(Ⅱ)若,求的面積.9、在△ABC中,已知2a=b+c,sin2A=sinBsinC,試判斷△ABC的形狀.10、在中,已知,判定的形狀.11、已知△ABC的三邊且,求。
8.高二英語(yǔ)必修5第一、二單元試卷(附答案)
新課標(biāo)《人教版》(必修5)第二單元測(cè)試附重點(diǎn)解析 一、基礎(chǔ)過(guò)關(guān)(每小題1分,滿分20分) A. 單詞拼寫 1. The committee c_consist__________ of ten members. 2. If you d___devide______ 30 by 5, the answer is 6. 3. Would you like to do a crossword p_________? 4. This building was constructed________ in the 1810s and it has a history of about 200 years. 5. They married last month but I didn't attend their wedding__________. 6. We should do all we can to improve __link________ (關(guān)系) between our two countries. 7. The position of the house combines quietness and ____convenience________ (方便). 8. The painting comes from his private __collection__________ (收藏). 9. To our _delight_________ (高興), he passed the entrance examination. 10. Can you __arrange_________ (安排) for car to collect them from the airport? B. 句型轉(zhuǎn)換 11. A: How many countries does the UK consist of? B: How many countries is the UK __made____ _up_____ __of______? 12. A: For those you have to go to older but smaller towns first built by the Romans. B: For those you have to go to older but smaller towns _______ ________ first _______ by the Romans. 13. A: Worried about the time available, Zhang Pingyu had listed the sites she wanted to see in London. B: Because she __was_____ __worried_____ about the time available, Zhang Pingyu had made a __list____ ____of__ the sites she wanted to see in London. 14. A: On my way to the station something was wrong with my car. B: On my way to the station my car _broke______ ____away___. 15. A: When she saw many visitors enjoying looking at the beautiful old Chinese pots and other objects on show, she felt very proud of her country. B. __As_____ many visitors enjoying looking at the beautiful old Chinese pots and other objects on show, she took _pride_____ __in____ her country. C. 完成句子 16. This medical team ___consist____ ____of___ (由…組成) seven doctors and fifteen nurses. 17. You should try your best to ___take____ ___place_____ ____of___ (改掉) such bad habits. 18. ___For_______ ___convenience_______ (為方便起見(jiàn)), the two groups have been treated as one in this report. 19. __To____ __her_____ _great_____ __surprise_______ (使她十分驚奇的是), Zhang Pingyu found the Queen's jewels ___guarded______ (守衛(wèi)著) by special royal soldiers. 20. Do you agree to his suggestion that the meeting __will____ _put______ _off_____ (推遲) till next week? 二、單項(xiàng)填空 (每小題1分,滿分15分) 21. The judging committee (評(píng)委會(huì)) _C_____ three women and four men. A. is consisted of B. makes up C. consists of D. is make up 22.He divided the tools __ B_________ the children, who were ___________ three groups. A. between; separated from B. among; divided into C. between; divided into D. among; separated from 23. — Do you smoke? — No, but I ___B________. A. was used to B. used to C. am used to D. don't 24. The __C___ boy wondered why fish soon went _____ in hot weather. He went to ask his teacher. A. puzzled; badly B. puzzling; bad C. puzzling; badly D. puzzled; bad 25. Mrs White found her husband surrounded by letters and papers and__B______ very worried. A. to look B. looked C. looks D. looking 26. A quarrel ___D________ last Sunday, and he ___________ his family. A. was broken out; broke away B. broke out; broke away C. was broke out; broke away from D. broke out; broke away from 27. Don't you believe it! Glass can __B______ steel in many ways in life. A. take place of B. take the place of C. in place of D. instead of 28. My interests include football, bowling and surfing the web __A_ studying my favorite subjects. A. as well as B. instead of C. less than D. rather than 29. The pilot asked all the passengers on board to remain ______ as the plane was making a landing. A. seat B. seating C. seated D. to be seating 30.. —Is this the computer you ________last week? —That' s________. A. had it repaired; the one B. repaired it; it C. had repaired; it D. had repaired; the one 31. John is _______London tomorrow and I will ________ at the Beijing Airport. A. leaving for; meet him B. leaving for; see him off C. leaving; see him off D. leaving; say good-bye to him 32. The plan ______ just because people were willing to cooperate (合作). A. broke down B. pulled down C. turned down D. put down 33. The boy said ______ couldn't he work out the problem but his teacher didn't know how to do it. A. though B. never C. hardly D. not only 34. — We are anxious about you. — ______________. A. 。