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- 1函数f(x)的定义域为（—∞,1],则f[log2(x^2-1)]的定义域是?
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- 3描点法画函数图像的三个步骤
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- 6This factory opened twent years ago同意句 This factory _______ ________ ______for twenty years
- 7无水Cacl2能吸收什么?
- 8The number of North American children who are obese-- who have more body face than do 85 percent of North American child
- 9is the warmth simple accompany 翻译
- 10he can _____(pass)me a piece of paper.