单项选择题

A．He is confident.
B．He is worried.
C．He is bored.
D．He is angry.
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单项选择题
Competence perception is about your understanding of your own potentials and abilities.
A．Y
B．N
C．NG
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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