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

Whichofthefollowingisthemaintopicofthepassage?[br]FromwhatThomasJ

Friendshipisoneofthegreatestpleasurethatpeoplecan(11).Atruefr

Friendshipisoneofthegreatestpleasurethatpeoplecan(11).Atruefr

Davidhasagreatestproblem.Thatis______.[br]Davidthinkshemightretire

Davidhasagreatestproblem.Thatis______.[br]Heleftschoolbecause______

Davidhasagreatestproblem.Thatis______.[br]Whywasheemployedbythefi

To:PeterHu,Deputy(副的)EditorFrom:DanielThomas,Editor-in-chiefDate:2009

To:PeterHu,Deputy(副的)EditorFrom:DanielThomas,Editor-in-chiefDate:2009

To:PeterHu,Deputy(副的)EditorFrom:DanielThomas,Editor-in-chiefDate:2009

To:PeterHu,Deputy(副的)EditorFrom:DanielThomas,Editor-in-chiefDate:2009

IntheUnitedStatesin1986,theaveragerateofviolentcrimeinstateswiths

MissZhangwasnotmorethanjustanEnglishteacher,becauseshealsotaughtme

Yearsago,doctorsoftensaidthatpainwasanormalpartoflife.Inpartic

正弦交流电压的波形图如图所示，该电压的时域解析表达式为：

热塑性粉末涂料在固化剂作用下经一定温度烘烤成为不能熔融的固体。

抗原的特异性取决于()。A.抗原的大小 B.抗原的物理性状 C.抗原结构的

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Davidhasagreatestproblem.Thatis.[br]Heleftschoolbecause