白棕绳受潮后,强度比原绳降低约:()A.1/5B.1/4C.1/3D.1/2
白棕绳受潮后,强度比原绳降低约:()
A.1/5
B.1/4
C.1/3
D.1/2
相关考题:
A.1/5B.1/4C.1/3D.1/2
白棕绳受潮后,强度比原绳降低约:()
A.1/5
B.1/4
C.1/3
D.1/2