1.(单选题)如图所示的各种截面中,当截面面积相等时,惯性矩lz最大的截面是()

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.T₁= -2kN·m

B.T₁= 5kN·m

C.T₁= -4kN·m

D.T₁= 10kN·m

A.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811354975.png">

B.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/170495981137920.png">

C.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811435752.png">

D.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811501695.png">

A.1420×104mm2

B.1302×104mm2

C.1254×104mm2

D.1177×104mm2

A.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811120603.png">

B.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811141111.png">

C.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811161288.png">

D.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811221182.png">

A.T1-1=6kN·m

B.T1-1=8kN·m

C.T1-1=13kN·m

D.T1-1=9kN·m

A.稳定性不同，强度相同

B.稳定性相同，强度不同

C.稳定性和强度都不同

D.稳定性和强度都相同

A.5MPa

B.10MPa

C.15MPa

D.0

A.宽度的平方

B.高度的立方

C.高度的平方

D.宽度的立方