What are they talking about?

What are they talking about?A.The lovely day. B.The heavy rain. C.The weather.

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属于生物可降解的合成高分子囊材是 (  )

属于生物可降解的合成高分子囊材是 (  )

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Wllich is true about the three countries?

Wllich is true about the three countries?A.They’re all on the sea. B.They’re al

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