单项选择题

A．More muscles than average people.
B．A strong will.
C．Strength, fitness and endurance.
D．A strong heart.
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单项选择题
A．Because the fibers of his muscles are very thick.B．Because he has more muscles.C．Because his muscles are made of more stringy fibers.D．Because the number of his muscles was fixed during his childhood.
A．Because the fibers of his muscles are very thick.
B．Because he has more muscles.
C．Because his muscles are made of more stringy fibers.
D．Because the number of his muscles was fixed during his childhood.
单项选择题
A．It increased the students’ white blood cell.B．It increased some students’ energy level.C．It improved the students’ ability to play musical instruments.D．It released a natural painkiller in some students’ bodies.
A．It increased the students’ white blood cell.
B．It increased some students’ energy level.
C．It improved the students’ ability to play musical instruments.
D．It released a natural painkiller in some students’ bodies.
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