某化学反应的微观示意图，如图所示：

①反应物中有一种化合物，它的化学式为____

②生成物中有____种氧化物

③反应物中未完全反应的物质的名称____，写出该物质的一种用途____．

阅读短文, 选择正确的答案。

     Most Chinese eat three meals a day. In the past, they had breakfast in the morning, a big lunch at noon, and a light supper at night.

     But now both men and women in the big cities have to work on the weekdays. So they often eat bread, eggs, milk and porridge for breakfast at home.  For lunch, Chinese take-away food is very popular.  They often have a quick lunch in their workplaces.

     After work in the afternoon, they have more time for supper.  They usually eat a big meal at home. Wives often cook meat, fish, chicken, vegetables and rice for their family.  You can also find dumplings and noodles on the table in most families of northern (北方的)  China.

看拼音,写词语。

dàng  yàng____   huán  rào____ xìng  fú____

shí qù____    chí  táng____ shuā  wǎn____     

hūn  shuì____   jī yā____   

____