单项选择题
A.1286 B.1432 C.1653 D.1797
A.鲍勃•泰勒(BobTaylor) B.巴特勒•拉姆泼逊(ButlerWrightLampson) C.恩格尔巴特(DouglasEngelbart) D.布鲁克斯(FrederickPhillipsBrooks,Jr.)
A.19.1% B.25.4% C.30.8% D.39.3%
A.1000 B.3000 C.5000 D.10000
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