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【单选题】
兰州黄土,天然含水率为4.6%,密度为1.322克每立方厘米,比重为2.68。当压力从0增加到200千帕时,百分表从8.550变化到8.174。此时压缩系数a0-2最接近()MPa-1。A.
0.029
B.
0.195
C.
0.039
D.
0.019
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