A、<img class=\""kfformula\"" src=\""data:image\/png;base64,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\"" data-latex=\""\\frac {s-1} {(5s+1)(s+1)}\"">
B、<img class=\""kfformula\"" src=\""data:image\/png;base64,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\"" data-latex=\""\\frac {1-Ts} {1+Ts}(T>0)\"">
C、<img class=\""kfformula\"" src=\""data:image\/png;base64,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\"" data-latex=\""\\frac {s+1} {(2s-1)(s-1)}\"">
D、<img class=\""kfformula\"" src=\""data:image\/png;base64,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\"" data-latex=\""\\frac {s+2} {(s+3)(s+2)}\"">
查看答案