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        // 产生三位数   百+十+个

        var bai = rand(1,9);

        var shi = rand(0,9);

        var ge = rand(0,9);

        console.log(bai,shi,ge)

        // 数字拼接的方法

        var num = '' + bai + shi + ge ;

        console.log(num);

    </script>

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