A.16 B.64 C.256 D.254
A.NOT,AND,OR,() B.(),NOT,AND,OR C.(),OR,NOT,AND D.(),AND,NOT,OR
A.不含小數(shù)點(diǎn) B.含小數(shù)點(diǎn) C.不含正負(fù)號 D.僅含0-9數(shù)字