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.惯性矩减小一倍
B.惯性矩不变
C.惯性矩增加八倍
D.惯性矩增加四倍
A.2
B.4
C.1/2
D.1/4
A.宽度的平方
B.高度的立方
C.高度的平方
D.宽度的立方
A.100mm
B.150mm
C.200mm
D.300mm
A.（a）
B.（b）
C.（c）
D.（d）
A.πd²/4
B.πd⁴/32
C.πd³/16
D.πd⁴/64
A.$ rac{1}{12}bh^3$
B.$ rac{1}{3}bh^2$
C.$ rac{1}{2}bh^3$
D.$bh^2$
A.\frac{\pi}{64}(D^4-(\alphaD)^4)
B.\frac{\pi}{16}(D^4-(\alphaD)^4)
C.\frac{\pi}{32}(D^4-(\alphaD)^4)
D.\frac{\pi}{8}(D^4-(\alphaD)^4)