单句改错：By the boy came to himself,he found he has been operated

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• 单句改错：By the boy came to himself,he found he has been operated
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• 单句改错When the boy came into the classroom,he found the others disappointing
• 函数y=ax+b和y=ax2+bx+c在同一直角坐标系内的图象大致是（　　） A. B. C. D.
• 列方程（组）解应用题：某货主准备租用汽车运输公司的甲、乙两种货车将一批货物运往外地，为简便起见，假设该公司每辆货车每次出车都按标准载重量装满．该货主恰好看到这两种货车