本题目来源于试卷: Physics Unit12: Sound，类别为 通用国际物理
[单选题]
On a day when the speed of s+ 0;)hhrdl 9zgg(pq noound in air 7 vsa n4,bt(4unxxt ac+ 2f)q;agiyd3 is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How far away was the objn3t bt+a4(4qi n ;2 ax)vcgfxsd ,7auyect that reflected back the sound?
A. $4.25 \; m$
B. $8.50 \; m$
C. $0.425 \; m$
D. $0.850 \; m$
参考答案: A
本题详细解析:
暂无
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