题目内容
居住在海拔200米～500米这一高度内的人口在总人口中所占的比例是()。
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A．rareB．minorC．scarceD．regular
"Please don't touch my violin, Midori," her mother scolded. The violin was, after all, worth more than $ 20 000. A professional musician never owns inexpensive musical instruments.
But Midori persisted; she longed to handle the graceful instrument that made beautiful sounds. Finally, on her third birthday, Midori was handed a package: a tiny violin, about half the normal size. That was Midori's first violin.
Almost from the moment Midori was born, her mother knew she was sensitive to music. For several years mother and daughter practiced together day after day. She-was eager to learn. She loved music from the bottom of her heart. Failure often led to tears ,though she never once turned from the instrument. She just could not stop her love for music. Instead, she persisted until the problem was overcome.
One day Johnson, an American musician, heard Midori playing the violin. He couldn't believe she was just eight years old. "She must make a tape and I will take it to the United States, "the musician said.
A famous American violin teacher heard the tape. He, too, had difficulty believing his ears. The playing was absolutely astonishing. He immediately accepted her as a pupil and recommended her for a full scholarship. In 1982 ,Midori and her mother moved to Neat York city, leaving behind a comfortable life in Japan.
(33)
有一投资项目，原始投资为270万元，全部投资均于建设起点一次投入，建设期为零，运营期为5年，每年可获得现金净流量69万元，则此项目的内部收益率为()。
居住在1000米以上高度的人口比重是多少？
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