单项选择题

A．Human brains differ considerably.
B．The brain a person is born with is important in determining his intelligence.
C．Environment is crucial in determining a person’s intelligence.
D．An environmentally handicapped person will never attain the level of intelligence of which he is capable
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单项选择题
A．Manners young people should have.B．Good deeds of the young.C．Bad behavior in the society.D．Rude manners of young people on buses.
A．Manners young people should have.
B．Good deeds of the young.
C．Bad behavior in the society.
D．Rude manners of young people on buses.
单项选择题
A．Because it is designed like a cradle.B．Because it is pulled and pushed by magnetic attraction and repulsion.C．Because it runs on air.D．Because there’s no friction between wheels and rails.
A．Because it is designed like a cradle.
B．Because it is pulled and pushed by magnetic attraction and repulsion.
C．Because it runs on air.
D．Because there’s no friction between wheels and rails.
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