A.几何不变
B.几何可变
C.瞬变
D.超静定结构
[单选题]( )。A.76B.96C.121D.125
[单选题]A.2B.-2C.0D.4
[单选题]A.2B.-2C.0D.4
[单选题]A.0.5AB.0.5mAC.2.5A
[单选题]A.0.5AB.0.5mAC.2.5A
[单选题]A.1.35MPaB.1.8MPaC.0.9MPaD.1.7MPa
[单选题]A.14.0L/s,1.08mB.9.0L/s,1.08mC.9.0L/s,0.66mD.14.0L/s,0.66m
[单选题]A.1.35MPaB.1.8MPaC.0.9MPaD.1.7MPa
[单选题]A.B.C.D.E.以上表示都不正确