单项选择题

哪位科学家首次提出了原子的有核结构？
A、卢瑟福
B、普朗克
C、爱因斯坦
D、波尔
E、汤姆逊

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单项选择题

Why did people come to Peter's office for a plastic surgery?
A、lost job
B、lost job and were sad
C、lost job and wanted to be"fresher" when finding a new job
D、not mentioned

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将资源名称与其IP地址匹配的应用层服务是：

A.Telnet
B.SMTP
C.HTTP
D.DNS