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- 3Tom did the work_______ his father instead或instead of填空
- 4一项工程,甲单独做要6天完成,乙单独做要8天完成.甲乙两人合做一天,完成这项工程的几分之几个?
- 5There is a _______(child) shoe shop next to our school.
- 6She goes to school on foot.1否定句2一般疑问句3肯/否句
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- 8Rt△ABC中,∠BAC=90°,AB=AC,D是BC的中点,AE=BF.求证:△DEF为等腰直角三角形.
- 9若两圆的周长和为28π厘米,且大圆半径是小圆半径的3倍,则小圆的面积是多少
- 10一个立方体的棱长为2乘10的2次方毫米.(1)它的表面积是多少平方米?(2)它的体积是多少立方米?