From the passage we know that Negroes ______. According to the passage what is unknown to many people is that

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问题 From the passage we know that Negroes ______.
According to the passage what is unknown to many people is that

选项 A、the drip cup benefited light industry.
B、the truth about carver was twisted or concealed.
C、sugar-refining owes a lot to a Negro.
D、a Negro invented the frying pan.

答案C

解析 文章第四段说,…who in 1846 invented a vacuum pan that revolutionized the sugar--refining industry?可知,黑人对炼糖业有极大贡献。
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