they are some difficult math problems.改为单数句 ---- ---- diffic

学习 时间:2026-08-15 22:12:21 阅读:1414
they are some difficult math problems.改为单数句 ____ ____ difficult math problems.

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隐形的雨

俏皮的小蝴蝶

2026-08-15 22:12:21

There's a difficult math problem。

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