触媒堆比重一般小于该触媒的密度。
参考答案：对
--Do you think there’s any possibility of the new educational programme next year?
--Quite possible, according to some well-informed person.
A．carrying out
B．carried out
C．to be carried out
D．being carried out
对教育工作具有普遍指导意义的政策，称为（）
