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为奖励期中考试中成绩优秀的同学,九(1)班花62元钱购买了单价分别为9元、5元的...
为奖励期中考试中成绩优秀的同学,九(1)班花62元钱购买了单价分别为9元、5元的A、B两种型号的黑色签字笔作为奖品,则共买了 支签字笔.
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如图,直线MA∥NB,∠A=75°,∠B=42°,则∠P=
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函数y=
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+
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已知二次函数y=ax
2+bx+c(a≠0)的图象如图所示,则正比例函数y=(b+c)x的图象与反比例函数y=
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A.
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B.
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C.
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D.
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A.
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D.
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