A.1/1000 B.1/800 C.1/1500 D.1/2000
A.屈服變形 B.拉伸破壞 C.脆性破壞 D.塑性破壞
A.增大; B.減?。?br /> C.不變
A.12.5% B.40% C.15% D.25%
A.8 B.6 C.4 D.3
A.柔性鋼索 B.剛性拉桿
A.1 B.3 C.6 D.12