12.调查是�学探究常用的方法之一下列对调查方法的叙述错误的是 A.调查时首先要明确调查的目的和对象b.要制定合理的调查方案c.调查时 Template




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tomski12.调查是�学探究常用的方法之一下列对调查方法的叙述错误的是 a.调查时首先要明确调查的目的和对象b.要制定合理的调查方案c.调查时 coloring