八年级上期期末数学测试卷(2)班级________学号_______ 姓名________ 总分___________一、选择题:(每题3分,共30分)1.下列各式中,正确的是 ( ) A. B. C. D. 2.计算(x-3y ) ( x +3y)的结果是 ( ) A. B

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