题目

如图,在△ABC中,点D是AB边上的一点,若∠ACD=∠B,AD=1,AC=2,△ADC的面积为3,则△BCD的面积为( ) A.12                      B.9                           C.6                         D.3 答案:B解:∵∠ACD=∠B,∠CAD=∠BAC, ∴△ACD∽△ABC, ∴=()2=4. ∵S△ACD=3, ∴S△ABC=4•S△ACD=12, ∴S△BCD=S△ABC﹣S△ACD=9.完形填空   Tolstoy, the great Russian writer, liked to walk about in a railway station near his home. One day when he was walking up and down as  1 , looking at people getting on and off the  2 , he heard a lady  3 after him. “Hey , you old fellow, go and fetch my handbag in the  4 room which I  5 there.”   Tolstoy  6 there. He  7 the bag up and walked quickly along the platform (站台).  8 the same time the lady was waiting beside the carriage, looking  9 . When at  10 the old man gave the bag back to her, she opened it to  11 sure nothing was  12 . “Good, old man,” said the woman. “You are just as quick as I can  13 . Here you are.” She gave a copper (铜) coin to him. Tolstoy  14 the coin and put it into his pocket with a smile.   But the woman was very  15 when she heard that he was Tolstoy, the author (作者) of the great novel WAR AND PEACE. She  16 to Tolstoy and said, “Oh, excuse me…Oh, how silly I was to  17  you for a porter (脚夫). Please throw back that coin  18  you forgive (原谅) me.   “Oh, madam, why? You have done  19 wrong.” Tolstoy laughed. The coin is given for my job, so I'll  20 it. Thank you, madam!” 1. [  ] A.possibleB.often C.usualD.well 2. [  ] A.trainsB.cars C.planesD.bikes 3. [  ] A.talkingB.speaking C.tellingD.shouting 4. [  ] A.nextB.meeting C.waitingD.dining 5. [  ] A.wentB.forgot C.leftD.bought 6. [  ] A.passedB.jumped C.wentD.entered 7. [  ] A.liftedB.gave C.pickedD.took 8. [  ] A.AtB.In C.ForD.By 9. [  ] A.happyB.back C.wellD.worried 10. [  ] A.firstB.last C.endD.sight 11. [  ] A.makeB.do C.takeD.get 12. [  ] A.losingB.inside C.missingD.wrong 13. [  ] A.exceptB.run C.doD.walk 14. [  ] A.showedB.watched C.acceptedD.picked 15. [  ] A.angryB.surprised C.happyD.worried 16. [  ] A.returnedB.changed C.saidD.turned 17. [  ] A.payB.take C.haveD.search 18. [  ] A.unlessB.if C.becauseD.until 19. [  ] A.somethingB.everything C.anythingD.nothing 20. [  ] A.throwB.remain C.keepD.stay
数学 试题推荐