A、<img class=\""kfformula\"" src=\""data:image\/png;base64,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\"" data-latex=\""\\frac {1} {\\sqrt {1+T{ω}^{2}}}\"">
B、<img class=\""kfformula\"" src=\""data:image\/png;base64,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\"" data-latex=\""\\frac {1} {\\sqrt {1+{(Tω)}^{2}}}\"">
C、<img class=\""kfformula\"" src=\""data:image\/png;base64,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\"" data-latex=\""\\frac {1} {\\sqrt {1-{(Tω)}^{2}}}\"">
D、<img class=\""kfformula\"" src=\""data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAAA2CAYAAAAxpDyoAAADcElEQVR4Xu2bS8hNURTHf99EkWcZeCvJIwozUoqJlGTkGUUMGHiF8laURyITeRQh71KSKAMmHklKSGRCJiKPIuXdqnXqftc537373rvPt+751pnde\/dZe53\/b6291tnn3Bb8MKVAiylv3BkciLEgcCAOxJgCxtzxDHEgxhQw5o5niAMxpoAxdzxDHIgxBYy54xniQKIo0AfYAGwHPkWZISejzZ4hvYFpwGzVa4EDySlyKkwzUTPEgdjggQMxAiJxw4E4kDgKNHtR9wyJExd1W\/Ulq24JG2vAgTRWz7qtOZC6JWyMgW7AGGAyMBfYATwDngJ\/GjNFvlaKUtTzVS3ibA4kori1mHYgtagW8Zw8gMgGYJGODzEvJg8g0gEV6bgT82LyABLT\/8LZzhPIEGAZsBP4EkHJscAp4BJwF5CHVtuAW8BFoBewBHgMbAF+VOlDbL9buZEnkOHAZmCFPkSSuecDP4ELVYrT1rClwDfgHPAXGA9cARYD1\/TESfr93oD5yv0OODV8aHsAWQ1I1M3UJ30bGwCkM7AWOAq8UxkWAmt0jhf6ndSzAYHzFR5IkiEi4gFdUipliET7L+BhRswNBmYAh4DfQCdgt4JfVPJYdw7wGrgXELsOJEUsWdoESCVwyalSL07rNkpIvUjj5EAaAGSEFvI9wJk2smE60B84Ujamuy5\/z9WOLKtJZgckV\/jQ9qghtSxZoRkiy9cJfSPlQYYskkXrgf3A+7Ixoot0ZKOA48A6B9JaoVAg8o7WVEAK+5sMIFOAgcBJ\/V12jfsCN0oagHHAzbLuMDzsA86wmCESufOAriXXMVrb46Rbkp++AmdT3sPqAhzU4i4d3fcMPVap2LJdLzpIrXkJnNfxsp0vMGWrpLRdD5A3fKhFIGlXEZIh\/bRuXAey7jekw5O3HI8Br4AewC4FKdAlKKRu7AN6OpD\/kYQASbshLLeYtMWPgKuAZMty3UWQu335\/Fbrx7COAES2NeRCV2prelm3ND5mJHk1QEbqTd8sLchbgdvAE+Bzit0J2l0JHLl\/ua8ZMQg4rNkiy12HaXtDFthqgITYCxnrQFLUkjVfjqwCHSJw6FgHEqpY5PGFBTIU2KQbfs30H45c\/c6z7Y0cyMUw70CMcXQgDsSYAsbc8QxxIMYUMOaOZ4gDMaaAMXc8Q4wB+QdP7tM3JR9fTwAAAABJRU5ErkJggg==\"" data-latex=\""\\frac {1} {\\left | {1+Tω} \\right |}\"">