单项选择题
—What’s this?
—_______a desk.()
A.This is
B.that is
C.It is
D.It
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单项选择题
—How _______you?—I_______fine,thanks.()
A.are;is
B.are;am
C.are;are
D.is,am
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单项选择题
内存地址从AC000H到C7FFFH,共有(3)个地址单元,如果该内存地址按宇(16bit)编址,由28块芯片构成。已知构成此内存的芯片每片有16K个存储单元,则该芯片每个存储单元存储(4)位。(50)
A.96
B.112
C.132
D.156
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