问题
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4,5,7,9,13,15,______ () A.17 B.19 C.18 D.20
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1,3/4,9/5,7/16,25/9,______ () A.15/38 B.11/36 C.14/27 D.18/29
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变阶处Ⅱ1-Ⅱ1截面弯矩与下列______项值接近?A.19.1kN·mB.26.4kN·mC.34.5kN·mD.43.8kN·m
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15,7,12,6,9,5,__________。 A.6.4 B.14.11C.6.5D.14.10
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以下序列中,是堆()的有()。A、{15,26,38,49,27,51,39,62}B、{15,23,71,94,72,68,26,73}C、{15,27,2" />