我的答案是
var a = arr.slice(0,3).join(",");
var b = arr.slice(3);
console.log(`欢迎${a}和${b}同学!`)
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张悦寒a
我的答案是
var a = arr.slice(0,3).join(",");
var b = arr.slice(3);
console.log(`欢迎${a}和${b}同学!`)