题海让大学四年没有难题
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题目详情

单选题 The estimate is based on the ________

A. direction of the hill

B. accepted speed of sound

C. interval between sound and echo

D. both "accepted speed of sound" and "interval between sound and echo"

新融合大学英语(I)课程封面

学科:新融合大学英语(I)

时间:2024-12-16 00:07:53

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