读古诗《咏柳》，根据意思写词语。

碧绿色的玉。这里用以比喻春天的嫩绿的柳叶。____ 

生活离不开化学，处处留心皆学问，请用下列物质的序号填空．

a．甲烷   b．熟石灰   c．干冰    d．活性炭

（1）可用于改良酸性土壤的是____ ；

（2）新农村建设中，许多家庭建了沼气池，沼气的主要成分是____ ；

（3）可用于净水的是____ ；

（4）可用于人工降雨的是____ ．

B

    Daming is my good friend.I like playing with him. He is1a city，2now he is in the countryside(乡村)3his parents. He likes4He can swim and play table tennis. His house is next5a river. It's not a tall6There are three7in his house. In front of the house, 8are some flowers.  There are some trees behind his house. This is his room.There9a bed and a desk in it.  He can10his homework on the desk.  He likes his house.