A.-σ
B.(1+μ)q
C.-(1+μ)q
D.-μq
[单选题]A.-σB.(1+μ)qC.-(1+μ)qD.-μq
[单选题]A.-σB.(1+μ)qC.-(1+μ)qD.-μq
[单选题]A.15B.16C.14D.18
[单选题]A.15B.16C.14D.18
[单选题]A.15B.16C.14D.18
[单选题]A.-σB.(1+μ)qC.-(1+μ)qD.-μq
[单选题]A.-σB.(1+μ)qC.-(1+μ)qD.-μq
[单选题]A.-σB.(1+μ)qC.-(1+μ)qD.-μq
[单选题]A.-σB.(1+μ)qC.-(1+μ)qD.-μq
[单选题]A.15B.16C.14D.18