①细胞壁  ②细胞膜  ③细胞质  ④线粒体  ⑤液泡  ⑥细胞核   ⑦叶绿体

1798年的一天，拿破仑站在吉萨金字塔前已经卧了几千年的巨大的狮身人面像前，对他的远征军说：“士兵们!4000年的历史在蔑视你们!”金字塔中的墓室壁画文字是

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.

在三位数abc中，已知a+b=9，b+c=10，则 abc÷c=____ ．