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A．As the result of the moisture in the Earth’s atmosphere.
B．As the result of the Earth’s rotation.
C．As the horizontal movement of air.
D．As the vertical movement of air.
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单项选择题
A．Working too long.B．Accumulated stress.C．Bad sleeping habits.D．Anti-social lifestyles.
A．Working too long.
B．Accumulated stress.
C．Bad sleeping habits.
D．Anti-social lifestyles.
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A．The tickets will sell out quickly.B．There will be extra tickets at the rock concert.C．The rock concert will probably be rescheduled.D．Each person will be allowed to buy only one ticket.
A．The tickets will sell out quickly.
B．There will be extra tickets at the rock concert.
C．The rock concert will probably be rescheduled.
D．Each person will be allowed to buy only one ticket.
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