下列关于Math对象的说法,不正确的有() A. SQRT1_2返回2的平方根 (约等于1.414); B. document.write(Math.round(4.7))用于返回4.7的四舍五入的取整值; C. document.write(Math.max(2,6,12,3,9,45,7)),结果是2; D. Math.round(vNum*10)会得到一个大于等于0,小于10的随机数;
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