swap(&arr[0], &arr[i]); // 堆顶(最大)换到末尾
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7) How is an NFT valued? What are the most expensive NFTs?The value of an NFT varies a lot based on the digital asset up for grabs. People use NFTs to trade and sell digital art, so when creating an NFT, you should consider the popularity of your digital artwork along with historical statistics.，详情可参考safew官方下载
“The river won, the forest won, the memory of our ancestors won,” said the campaigners in Santarém when it was clear their actions had forced the Brazilian government into a U-turn on plans to privatise one of the world’s most beautiful waterways and expand its role as a soy canal.