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作业

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denao_denao

#1 Created at ... [Delete] [Delete and Lock User]

arr.sort(); var x = `欢迎${arr[0]},${arr[1]},${arr[2]}和${arr[3]}同学`; alert(x);

arr.sort(); var sp_arr = arr.splice(2,1); arr =arr.join(','); alert(欢迎${arr}和${sp_arr}同学!);


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