21.若A1#=3.1415943278,則變數A1#在主記憶體中佔用幾個位元組(byte)
(A)12
(B)8
(C)4
(D)2
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統計: A(18), B(40), C(25), D(13), E(0) #980031
統計: A(18), B(40), C(25), D(13), E(0) #980031