A.有效經(jīng)過(guò)年齡等于實(shí)際經(jīng)過(guò)年齡 B.有效經(jīng)過(guò)年齡短于實(shí)際經(jīng)過(guò)年齡 C.有效經(jīng)過(guò)年齡長(zhǎng)于實(shí)際經(jīng)過(guò)年齡 D.有效經(jīng)過(guò)年齡可能短于或長(zhǎng)于實(shí)際經(jīng)過(guò)年齡
A.2.00% B.2.13% C.2.22% D.2.50%
A.40 B.45 C.50 D.60