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作业

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MightyLu

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

// 第一题 var x = arr[1][1]; // 第二题 console.log('欢迎' + arr.join(', ') + '同学');

忘记名自的鱼

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

var x = arr[1] = 500

var z=arr[1] var x=z[1]

看到我写的 东西 我想哭

冯绍03228

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

兄弟你确定你写不是来搞笑的 ！ 这个是第一题： var arr = [[1, 2, 3], [400, 500, 600], '-']; var x = [].concat.apply([],arr).slice(4,5) console.log(x)//500

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