国家行政机关公文由哪三部分组成？
参考答案：
由眉首、主体、版记三部分组成。
The question is too difficult and we found ________.
A．it not easy to answer it
B．it was not easy for us to answer it
C．it’s not easy to answer
D．it not easy to answer
理解物流要领应注意哪些基本要点？
