Thomas Alva Edison is known as one of the greatest inventors of his time. He

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问题    Thomas Alva Edison is known as one of the greatest inventors of his time. He was awarded more patents (专利权) on inventions than any other Americans. When he died in 1931, Americans wondered how they could best show their respect for him.
   One suggesti

选项 A、Edison received the first American patent.
B、Edison got the most patents in America at that time.
C、Edison was the only American inventor.
D、Edison was the first American inventor.

答案 B

解析
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