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zuoye

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Moecy

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

第一题

function sum(...rest) {
var j ,sum=0;
for(var j of rest){
    sum += j;
}return sum;
}

第二题

    var a = 0;
    if (arguments.length === 1)
    pi = 3.14;
    return a = pi*r*r;

第三题

    if (a > b) {
        return a;
    } else {
        return b;
    }

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