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一、题文
Many girls go to your house. They bring all their pet dogs. In all, there are 22 heads and 72 feet. How many girls and dogs are there in the room? [ ] A. 6 girls and 16 dogs B. 7 girls and 15 dogs C. 8 girls and 14 dogs D. 9 girls and 13 dogs
二、解答
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