A.
B.
C.
D.
[单选题]A.B.C.D.
[单选题]A.20B.33C.38D.47E.49
[单选题]A.0B.3/2mιC.m/ιD.-m/ι
[单选题]A.70.7×70.7×70.7B.100×100×100C.150×150×150D.200×200×200