单项选择题

In digital electronics, signals are broken down into thousands, maybe millions,______, which are encoded as zeroes and ones.

A．of information
B．of bits of information
C．of little in formation
D．of much in formation
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The normal food______ of man depend in part on the amount of external work he does.
A．quantities
B．requirements
C．necessities
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He failed to completely achieve the aim ______ by the teacher at the beginning of the term.
A．brought forth
B．set forth
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