单项选择题
A.扬基债券 B.武士债券 C.龙债券 D.外国债券
A.1.09% B.2.08% C.2.11% D.1.78%
A.0.3和0.7 B.0.4和0.6 C.0.7和0.3 D.0.5和0.5