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Created with an evaluation copy of Aspose.Words. To discover the full versions of our APIs please visit: :products.asposewordsCreated with an evaluation copy of Aspose.Words. To discover t
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八上数学作业本答案◆随堂检测1化简 -2 的结果是( )A.4-2 B.0 C.2 D.42下列各式中一定能成立的是( )A. B. C. D. 3已知x<y化简 为_______.4若 则 _________若 则 ________.5当 时求2- 的值是多少◆典例分析有一道练习题是:对于式子 先化简后求值.其中 .小明的解法如下: =
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参考答案第1章 平行线【1.1】1.∠4∠4∠2∠5 2.213BC 3.C4.∠2与∠3相等∠3与∠5互补.理由略5.同位角是∠BFD 和∠DEC同旁内角是∠AFD 和∠AED6.各4对.同位角有∠B 与∠GAD∠B 与∠DCF∠D 与∠HAB∠D 与∠ECB内错角有∠B 与∠BCE∠B 与∠HAB∠D 与∠GAD∠D 与∠DCF同旁内角有∠B 与∠DAB∠B 与∠DCB∠D 与∠DAB∠D
复习题1.A 2.D 3.A 4.C 5.D 6.C 7.A 8.B 9.B 1O.D 11.C 12.A 13.D 14.C 15.C 16.(1)海洋水 陆地淡水 冰川水 地下淡水 (2)海洋水 冰川水 17.氧气 氢气 氢和氧 18.增大 相等 密度 19.向上物体排
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