2011 Beijing Question 4 Single-choice Differentiating 2011_北京 Paper 4.(5分)(2011•北京)执行如图所示的程序框图,输出的s值为( ) A. ﹣3B. ﹣ $\begin{array} { l } { { \frac { 1 } { 2 } } } \end{array}$C. $\frac 1 3$D. 2 Answer keyD ☆ SaveCan't do it, show the explanation查看原卷 →