A.建筑物的經(jīng)濟壽命短于自然壽命，有效經(jīng)過年數(shù)也短于實際經(jīng)過年數(shù)
B.建筑物的經(jīng)濟壽命長于自然壽命，有效經(jīng)過年數(shù)也可能長于實際經(jīng)過年數(shù)
C.建筑物的經(jīng)濟壽命與自然壽命相等，有效經(jīng)過年數(shù)與實際經(jīng)過年數(shù)也相等
D.建筑物的經(jīng)濟壽命短于自然壽命，有效經(jīng)過年數(shù)可能短于也可能長于實際經(jīng)過年數(shù)