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江苏2010年高考数学试题节选
2、设复数z满足z(2-3i)=6+4i(其中i为虚数单位),则z的模为___________
3、盒子中有大小相同的3只小球,1只黑球,若从中随机地摸出两只球,两只球颜色不同的概率是______________
4、某棉纺厂为了了解一批棉花的质量,从中随机抽取了100根棉花纤维的长度(棉花纤维的长度是棉花质量的重要指标),所得数据都在区间[5,40]中,其[
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