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单项选择题
A．a book about computer programming.B．a book about computer science.C．a book about natural science.D．a book about physics.
A．a book about computer programming.
B．a book about computer science.
C．a book about natural science.
D．a book about physics.
单项选择题
A．health.B．age.C．weight.D．height.
A．health.
B．age.
C．weight.
D．height.
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