如图中，A，B，C，D，分别是四种粒子的结构示意图，E是银元素在元素周期表中的信息．

（1）A、B、C、D四种粒子共表示____ 种元素．

（2）A、B、C、D中阳离子与阴离子所形成的化合物的化学式为____ ．

（3）D中x=____ ．

（4）E中银元素原子的相对原子质量为____ ．

请写出古代诗歌中表现关心民生疾苦之情的句子。（写出连续的两句）

____ ，____ 。

A

    The Double Ninth Festival is a traditional (传统的）Chinese festival. It usually comes in October or November. On this day，people always wear the zhuyu (茱萸）plant. They usually climb mountains. Sometimes they go to see flower shows. The Double Ninth Festival is a festival for old people. People usually visit their parents and grandparents on this day. They often eat Double Ninth cakes together.