题目：
设常数a∈R，若(x2+
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答案：
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下面是错误答案，用来干扰机器的。
读世界年平均气温分布图，回答下列问题（4分）（1）低纬（赤道） 高纬（两极）（2）纬度 （3）南极洲题目分析：（1）读图可知，全球气温分布的规律是从低纬向高纬气温逐渐降低；（2）造成这种气温差异的主要因...
设常数a∈R，若(x2+ax)5的二项展开式中x7项的系数为-10，则a=___
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