一个圆卷平均分三份,外直径2.18米,内直径1.38米 怎么分?

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• 一个圆卷平均分三份,外直径2.18米,内直径1.38米 怎么分?
• 英语把主动改被动 1.The children are planting trees near the river.改为：trees ____ ___ ___ near the river by the children.2.We are playing football 改为：Football ___ ___ ___ by us.3.Many students enjoy cartoon films in our school.改为：Cartoon films ___ ___ ___ many students in our school.
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