单项选择题

A．Because it is short of vitamins.
B．Because it is not very clean.
C．Because there are additives.
D．Because there are not many varieties.
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单项选择题
A．Relax.B．Fidget.C．Lie perfectly still.D．Make more eye movements.
A．Relax.
B．Fidget.
C．Lie perfectly still.
D．Make more eye movements.
单项选择题
A．The removal of water in food helps prevent it from going rotten.B．The open-air method of drying food has been known for hundreds of years.C．In the course of dehydration, the temperature of hot current coming from entry to exit is gradually going up.D．The process of drying liquids is much more complex than that of drying solid food.
A．The removal of water in food helps prevent it from going rotten.
B．The open-air method of drying food has been known for hundreds of years.
C．In the course of dehydration, the temperature of hot current coming from entry to exit is gradually going up.
D．The process of drying liquids is much more complex than that of drying solid food.
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