A.0
B.3/2mι
C.m/ι
D.-m/ι
[单选题]A.0B.3/2mιC.m/ιD.-m/ι
[单选题]A.0B.3/2mιC.m/ιD.-m/ι
[单选题]A.0B.3/2mιC.m/ιD.-m/ι
[单选题]A.0B.3/2mιC.m/ιD.-m/ι
[单选题]A.0B.3/2mιC.m/ιD.-m/ι
[单选题]A.0B.3/2mιC.m/ιD.-m/ι
[单选题]A.0B.3/2mιC.m/ιD.-m/ι
[单选题]A.0B.3/2mιC.m/ιD.-m/ι
[单选题]A.20B.33C.38D.47E.49
[单选题]A.20B.33C.38D.47E.49