1.(单选题)试对下图所示体系进行几何组成分析。

A.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959828111363.png">

B.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/170495982813419.png">

C.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959828155698.png">

D.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959828175385.png">

A.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959827846305.png">

B.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959827873890.png">

C.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959827893212.png">

D.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959827952714.png">

A.-50kN(压力)

B.-60kN(压力)

C.-75kN(压力)

D.-80kN(压力)

A.FAX=O、FAY=15kN(↑)、MA=65kN·m(逆时针)，RC=5kN(↑)

B.FAX=O、FAY=5kN(↑)、MA=65kN·m(逆时针)，RC=15kN(↑)

C.FAX=O、FAY=20kN(↑)、MA=65kN·m(顺时针)，RC=10kN(↑)

D.FAX=O、FAY=25kN(↑)、MA=50kN·m(顺时针)，RC=15kN(↑)

A.22kN(拉力)

B.24kN(拉力)

C.-22kN(压力)

D.-42kN(压力)

A. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/17049597618391010.png">

B. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959761922405.png">

C. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959761979638.png">

D. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959762029364.png">

A.1

B.2

C.3

D.4

A.由于产量增加50m3，成本增加21300元

B.由于单价提高40元，成本增加35020元

C.实际成本与目标成本的差额为56320元

D.由于损耗下降2%，成本减少9600元

A.NAB=-2kN(压力)、NBC=1kN(拉力)、NCD=-1kN(压力)

B.NAB=-1kN(压力)、NBC=1kN(拉力)、NCD=-1kN(压力)

C.NAB=-2kN(压力)、NBC=2kN(拉力)、NCD=-1kN(压力)

D.NAB=-2kN(压力)、NBC=1kN(拉力)、NCD=-2kN(压力)