2014 Beijing Question 4 Single-choice Differentiating 2014_北京卷 (2014·文) 4.(5 分)执行如图所示的程序框图,输出的 S 值为( ) A. 1B. 3C. 7D. 15 Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →