单项选择题

用反子波与地震记录做褶积,可以得到
A、波阻抗
B、地震波速度
C、反射系数
D、地震子波

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单项选择题
时间定额单位为( )。 A、m3·m2·m... B、工日 C、m3·m2·m... 工日 D、工日/m3·m2·m...
未分类题
It can be inferred from the passage that ______.A.killing foxes with poison is illegalB.limiting the fox population is unnecessaryC.hunting foxes with dogs is considered cruel and violentD.foxhunting often leads to confrontation between the poor and the rich
A.A.killing
B.limiting
C.hunting
D.foxhunting
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