单项选择题
A.12 B.10 C.9 D.11
A.保护知识产权 B.加大研发投入 C.宽容失败 D.重视教育
A.50.27% B.51.27% C.52.27% D.53.27%
A.1000 B.4000 C.2000 D.3000
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