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单项选择题
A．The amount of tears can be adapted.B．Crying affects the feelings.C．Tears discharge chemicals built up during stress.D．Crying leads to producing more chemicals in mars.
A．The amount of tears can be adapted.
B．Crying affects the feelings.
C．Tears discharge chemicals built up during stress.
D．Crying leads to producing more chemicals in mars.
单项选择题
A．To read the book by the famous British writer.B．To cover their eyes during a period of intensive reading,C．To visit doctors of traditional Chinese medicine.D．To relax their eyes frequently while reading.
A．To read the book by the famous British writer.
B．To cover their eyes during a period of intensive reading,
C．To visit doctors of traditional Chinese medicine.
D．To relax their eyes frequently while reading.
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