①大众传媒可以充分挖掘传统文化的商业价值
②文化内容与形式的创新有利于传承传统文化
③全面继承传统文化是当代电视人的崇高使命
④源远流长的中华文化借助大众传媒得以彰显
A:①②
B:②③
C:②④
D:③④
He hurried to the station only _______ that the train had left.
—The light in his room is still on.Do you know________?
—In order to prepare for the coming exam.
小明从图所示的二次函数y=ax2+bx+c的图象中,观察得出了下面五条信息:①c<0;②abc>0;③a-b+c>0;④2a-3b=0;⑤c-4b>0,你认为其中正确信息的个数有( )