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培优专项训练(五)Ⅰ.单项填空( )1. This morning I had hardly got to my school when it ________ to .had begunB.was beginningC.beganD.begins ( )2. He ________ when the UFO arrived. He didnt wake until the UFO .
培优专项训练(二)Ⅰ.高频考点( )1. Lets go to see the sick kids and ________.A.cheer them upB.cheer up themC.clean up themD.fix them up( )2. If you do your best Im sure youll ________ do it .canB.couldC.are a
培优班训练二答案1.化简 的结果为( )A.6a B.-a C.-9a D.9a解:原式 -9-9a. 2.若函数yaxb-1(a>0且a≠1)的图象经过第二三四象限则一定有( )A.0<a<1且b>0 B.a>1且b>0 C.0<a<1且b<0 D.a<1且b>0解析: 根据题意画出函数yaxb-1(a>0且a≠1)的大致图象如图所示.所
培优专项训练(七)Ⅰ.单项填空( )1. —Which do you like ________ summer or winter—I prefer .goodB.wellC.betterD.best ( )2. —Its so cold today.—Yes its ________ colder than it was .someB.moreC.veryD.much( )3.
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- 3 - 151分式专题一分式有意义的条件、分式的值为0的条件1.使代数式有意义,那么x的取值范围是( ) A.x≥0 B.x≠1 C.x>0 D.x≥0且x≠12.如果分式的值为0,则x的值应为.3.若分式的值为零,求x的值.专题二约分4.化简的结果是( ) A.2n2 B. C. D.5.约分:=____________.6.从下列三个代数式中任选两个构成一个分式,并将它化简:4x
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