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【单选题】
计算机中的所有信息都是以二进制方式表示的，主要理由是（）。A.
运算速度快
B.
所需的物理元件最简单
C.
数据处理方便
D.
设备配置方便
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反馈参考答案：
举一反三
【单选题】It’s no good ______ when you don’t really.
A.
to pretend to understand
B.
pretend to understand
C.
pretending understanding
D.
pretending to understand
【单选题】It’s no good ___ money on make-up.
A.
of you to waste
B.
for you to waste
C.
to waste
D.
your wasting
【单选题】It’s no good ____ until I’m reasonably sure when I’ll be able to go for my holiday.
A.
to decide
B.
to have decided
C.
deciding
D.
being decided
【单选题】It’s no good ____ a lot without doing anything.
A.
to talk about
B.
talking about
C.
to talk
D.
talking
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