单项选择题

A．A product launch that didn’t succeed.
B．A new idea that became a commercial success.
C．A manufacturing problem.
D．A new design of the bicycle helmet.
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单项选择题
A．A child may accept another person’s underestimate of his ability.B．He may think that he is too young to make the most of his mental faculties.C．A person may have the idea that he is incapable of doing good work.D．Some old people don’t believe that they are capable of learning anything new.
A．A child may accept another person’s underestimate of his ability.
B．He may think that he is too young to make the most of his mental faculties.
C．A person may have the idea that he is incapable of doing good work.
D．Some old people don’t believe that they are capable of learning anything new.
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