2015 National Question 2 Single-choice Differentiating 2015_退役省自主命题 (2015·理) 2.下列函数为奇函数的是( A. $y=\sqrt{x}$B. $y=|\sin x|$C. $y=\cos x$D. $y=e^{x}-e^{-x}$ Answer keyD ☆ SaveCan't do it, show the explanation查看原卷 →