A.n1>n2 B.n1 C.n1=n1 D.不能确定
A.0 B.P C.-P D.1.414P
A.ql4/3EI B.ql4/4EI C.7ql4/24EI D.11ql4/24EI
A.1/2 B.1/ C.2 D.
A.A.>B.>C. B.C.>B.>A. C.B.>A.>C. D.A.>C.>B.