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

学习 时间:2026-06-05 16:34:35 阅读:6382
they are some difficult math problems.改为单数句 ____ ____ difficult math problems.

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狂野的酒窝

着急的饼干

2026-06-05 16:34:35

There's a difficult math problem。

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