单项选择题

A．It helps the harmony between human body and eating habits.
B．It is to lose extra weight, especially for the middle aged.
C．It helps body feature.
D．It can release stress.
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单项选择题
A．Fish have difficulty absorbing oxygen in warmer seawater.B．The seawater temperature is increasing.C．Fish have trouble finding enough food in warmer seawater.D．More fish have to find another location.
A．Fish have difficulty absorbing oxygen in warmer seawater.
B．The seawater temperature is increasing.
C．Fish have trouble finding enough food in warmer seawater.
D．More fish have to find another location.
单项选择题
A．For the sake of decoration.B．To show their male dominance.C．For self-protection.D．To attract animals in different sex.
A．For the sake of decoration.
B．To show their male dominance.
C．For self-protection.
D．To attract animals in different sex.
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