12航天器4月份月考試卷

1、?數(shù)學(xué)?一、選擇題(每題2分)11. 1 xcosxdx =()A.O B.cosx C.1D.x2. 設(shè) f(x)dx x3 C,那么 o f(x)dx=()A.2;B.4;C.6;D.83. 設(shè)f x為連續(xù)函數(shù),f 2xdx等于A. f(2)f(0);1B.Jf(0)；1eg f(2)4. elndx等于1 xf (0);D.f(1)f (0)A. 2；2B.2C.*1；2；D.4-5. 1 e xdx =(A.e22B.2C.262D.2e二、用定積分表示以下各組曲線圍成的平面圖形的面積每題1.5 分2(1) y=1 x ， y=0;(2)y=si n x,x=2，x=,y=0;三、求出

2、以下曲線所圍成的圖形按指定的軸旋轉(zhuǎn)產(chǎn)生的旋轉(zhuǎn)體的體積每題3 分1. x 5-y2x=1繞y軸;2.Y=xx=1， y=0 繞-軸、求以下定積分每題 3分2.3. oxsi nxdx 0 X sin xdx?英語(yǔ)?、選擇題：每題2分1. -“ Who is he? -“ I don 'know. You may ask Mary A. who he is B. who is he C. he is who2. - “ We'er late. The play has started. -“ I wonder how long ago A. did it beg inB. it b

3、ega n C. does it beg in3. He asked me if A. I had enjoyedB. had I enjoyedC. I enjo yedD. did I enjo yed4. The teacher asked me A. how old was IB.how old I wasC. how was5. I' d like to knowhowimprove the desig n.A. could IB. I canC. canD.I could6.According to thetime table,the train forBeiji ngat

4、 9:10 p.m. fromMon day to Friday.A. was leav ingB. is leavi ngCeavesD.has left7.The proposalat themeeting nowis of greatimportanee to ourdepartme nt.A.be ing discussedB.to be discussedC.havi ng discussedD.discuss ing8.o nly whe n we hurried to the airport the flight was can celled.A.we found B. did

5、we findC. which D.we have found9. Allan is looking forward to his American partner at the fair.A. meet B. meeti ngC.be meeti ngD.havi ng met1O.By the time you come to see me next mon th, I my term paper.A.we foundB.did we findC. have we foundD. we have found二、填空(每題1.5分)1. If the were here tomorrow,

6、the problem(solve) .2. He wouldn ' tnave been saved even if he even if he never(send) tohospital at on ce.3. If only I (take) your advice at that time!4. We wish that people everywhere (show) more concern for theen vir onment around them.5. It is a great pity that he (be) so stubborn(頑固)6. He wo

7、uld rather you(not see) him nay more in the future.三、翻譯句子：1. Could you tell me where I can buy chewing gum?(3分)2. I just want toknow whichcolor you like , red or yellow? ( 3分?航空航天概論?填空題每空1分2. 世界上第一架動(dòng)力飛機(jī)的飛行時(shí)間是 。4. 低速飛機(jī)的阻力按其產(chǎn)生的原因不同分為： 、 。6. 為了減小摩擦阻力，應(yīng)盡量減小飛機(jī)的 并將其外表。名詞解釋：名詞解釋：1什么是標(biāo)準(zhǔn)大氣壓。3分2什么叫做機(jī)翼的迎角。3分簡(jiǎn)答題：1要使飛機(jī)飛行必須解決哪三個(gè)技術(shù)問(wèn)題？3分2. 表達(dá)伯努利定理？ 2分寫(xiě)出其公式？ 1分3. 解釋連續(xù)性定定理？ 2分公式？ 1分4. 飛機(jī)開(kāi)展的三個(gè)矛盾？ 3分?機(jī)械設(shè)計(jì)根底?一、填空題各1分1常見(jiàn)的失效形式