I'm sorry to say that I didn't ________ him to become a successful writer.
读太阳光照图(如图阴影部分为黑夜),完成下题.
所谓尺规作图中的尺规是指:____.
有一根长60cm的铁丝,用它围成一个矩形,写出矩形面积S(cm2)与它的一边长x(cm)之间的函数关系式为( )