单项选择题

A．Their operation speed increases.
B．Their operation speed also decreases.
C．Their micro-components’ endurance also decreases.
D．Their micro-components’ endurance increases.
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单项选择题
A．Working hard.B．The birth of her two children. C) A hectic social life.C．The fields and hills.
A．Working hard.
B．The birth of her two children. C) A hectic social life.
C．The fields and hills.
单项选择题
A．They are moving pictures, color and photographers.B．They are moving pictures, sound and photographers.C．They are sound, color and photographers.D．They are sound, color and moving pictures.
A．They are moving pictures, color and photographers.
B．They are moving pictures, sound and photographers.
C．They are sound, color and photographers.
D．They are sound, color and moving pictures.
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