
A.-6
B.6
C.-1/12
D.1/12
[单选题]A.-6B.6C.-1/12D.1/12
[单选题]A.70.42%B.87.4%C.69.96%D.29.13%
[单选题]A.2.2㎡B.2.8㎡C.3.5㎡D.4.4㎡
[单选题]A.99.5%,90.4%B.97.2%,90.4%C.96.4%,90.0%D.89.8%,88.0%
[单选题]A.AB段q=0,BC端q≠0,B截面处有集中力B.AB段q=0,BC端q=0,B截面处有集中力C.AB段q=0,BC端g≠0,B截面处有集中力偶D.
[单选题]A.AB段q=0,BC端q≠0,B截面处有集中力B.AB段q=0,BC端q=0,B截面处有集中力C.AB段q=0,BC端g≠0,B截面处有集中力偶D.