单项选择题

Digestion______ the necessary chemical changes in the food which must occur before it can be absorbed.

A．consists in
B．feeds in
C．puts in
D．consists of
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单项选择题
Many of the successful men, had they been able to choose for themselves, would have selected some quite different professions______ they have made fortunes.
A．from that in which
B．from which
C．in which
D．from what
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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