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1、集合参考答案:1、2、3、4、⑴、⑵、⑷5、6、77、8、9、10、11、或12、13、14、除法15、解:由题意得:,解得:,∴定义域A=,解得:,∴值域B=(1)∵,∴,∴∴的取值范围为(2)∵,∴,∴,∴的取值范围为16、解:由已知A={x
2、x2+3x+2}得得.(1)∵A非空,∴B=;(2)∵A={x
3、x}∴另一方面,,于是上面(2)不成立,否则,与题设矛盾.由上面分析知,B=.由已知B=结合B=,得对一切x恒成立,于是,有的取值范围是17、解:依题意得:(1)当,;(2)当,要使,则,解得:;(3)当,,不符合题设。综合上述得:。18、解:由题意,得x2-(
4、m+1)x+4=0在[0,3]上有且仅有一解①△=0时方程有相等实根且在[0,3]上,即 ∴m=3②△>0时,只有一根在[0,3]上,两根之积为4>0,则32-(m+1)×3+4<0,∴m>所以,m的取值范围是m=3或m>。19、∵,∴,将代入,得,设,令,当时,。依题意得,∴20、(1)(见右图)(2)方程的解分别是和,由于在和上单调递减,在和上单调递增,因此。由于。(3)当时,。令,,又,①当,即时,取,。,则②当,即时,取,=由①、②可知,当时,,因此,在区间上,的图像位于函数图像的上方。练习一(Module1)一、单项选择1-5BCADA6-10AAABC11
5、-15CBDBA二、完形填空16-20DBBAC21-25CAADB26-30CDABC31-35DABBC三、阅读理解36-40DAACB四、单词拼写41.preparation42.experienced43.challenging44.attractive45.affected/attacked46.valuable47.forbidden48.explanations49.achievement50.exercise五、任务型阅读51.concerned/cared52.use/function53.attracted 54.image 55.ways 56
6、.stressed 57.communication58.reason 59.lifestyle 60.Examples 练习二(Module2)一、单项选择1-5BACDB6-10ADACC11-15ACBBB二、完形填空16-20ADDCB21-25DAACB26-30CADBA31-35BCACB三、阅读理解36-39BAAB无四、单词拼写41.average42.adventurous43.breathed44.coincidence45.express46.recently/lately47.evidence48.similarities49.unco
7、mfortable/uneasy50.actually五、任务型阅读51.consumers/customers52.feel/are53.brands54.knowledge55.Reasons56.probable57.choice58.ordinary59.less60.truth六、书面表达Onepossibleversion:TheGreenSchoolProjecthasbecomepartoftheenvironmentaleducationinourschool.However,therearestillalotofproblemintheschool
8、.Veryoftenyoucomeacrossanemptyclassroomwiththelightsstillon.It’snotdifficulttofindevidenceofwastingwater,averyseriousproblem.Additionally,studentsdonotrecycleenough,throwingawaythesoftdrinkbottles,usedexercisepapersandbooks.Worsestill,manystudentsstillusethenon-environmentalfriendlylunc
9、hboxes,causingthe“whitepollution”.Thesethingsshouldthatmanystudentslackthesenseofenvironmentalawareness.It’simportanttoeducatestudentstobemoreenvironmentallyfriendly.Atthesametime,studentscandosmallthings,suchascollectinguseditemsforrecycling,turningoffthelights,savingwater.Alw