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- 3平衡膳食宝塔的作用是什么
- 4一个学生从家到学校,如果以每分钟50米的速度行走,就要迟到3分钟,如果以每分钟70米的速度行走,
- 5一个三位数,三个数位上的数字之和是15,个位上的数是十位上的数的3倍,百位上的数比十位上的数多5,求这个数
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- 7___the boy that played tricks on his teacher A ,they were B it were C there were D it was
- 8谁有六年级上册语文同步练习册的答案
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