A.49/16kN,19/16kN,14/16kN B.1kN,1kN,5kN

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问题 A.49/16kN,19/16kN,14/16kNB.1kN,1kN,5kNC.2kN,2kN,3kND.3kN,3kN,1kN

选项 A.49/16kN,19/16kN,14/16kN
B.1kN,1kN,5kN
C.2kN,2kN,3kN
D.3kN,3kN,1kN

答案 C

解析
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