试题与答案

大多数人体组织的声阻抗在(1.4~1.7)×105ray/s,需除外的是() A.骨

题型:单项选择题 A1/A2型题

题目:

大多数人体组织的声阻抗在(1.4~1.7)×105ray/s,需除外的是()

A.骨骼、气体、肌肉

B.骨骼、肌肉

C.气体、肌肉

D.骨骼、气体

E.肌肉

答案:

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参考答案:B解析:本题考查商品流通宏观调控的手段。商品流通宏观调控的手段:经济手段、法律手段、行政手段。

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题型:单项选择题 案例分析题

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