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:269,286,302,307,()。A.310B.317C.318D.316
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256,269,286,302,()A. 254 B. 307 C. 294 D. 316
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叠合面的受剪承载力Vu=______kN。A.225.5B.235.6C.256.1D.269.2
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269,286,302,307,()。 A.310B.317C.318D.316
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76,95,159,187,278,()A.343B.476C.395 D.369
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256,269,286,302,() A.254 B.307 C.297 D.316
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256 269 286 302 ( )。A.254B.307C.294D.316