there are 600 students in a school,30 students in every class.every

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there are 600 students in a school,30 students in every class.every
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there are 600 students in a school,30 students in every class.every
there are 600 students in a school,30 students in every class.every

there are 600 students in a school,30 students in every class.every
这个学校有600名学生,每个班有30名学生