地沟油中含有杂质及有毒物质，很多人猜想它的密度应该比正常食用油的密度要大，为了验证这种猜想，小明找到质量为0.46kg的地沟油，测出其体积为0.5L，该地沟油的密度____ kg/m³；能否用密度这一指标来鉴别地沟油。____ 理由是：____ 。
（已知正常食用油的密度约为0.91×10³ kg/m³～0.93×10³ kg/m³）

    I have a friend. He is a boy. His name is Nick. He is from England. Nick is a sports fan. He likes 1 every kind of games. He likes basketball, football, tennis, badminton 2 swimming. Nick is good at 3 football. Yang Chen is his favourite football player. Nick is a member 4 the Football Club. When he goes shopping, he always 5 newspapers 6sports and he often reads sports news. His school is very big and beautiful. There is a football tennis court and a swimming pool in his school. He usually plays football 7 his friends after school. Nick says that he wants to 8 a football player when he grows up. Nick often goes to the stadium (体育馆) to watch the football games 9 the weekend. He 10 want to miss any match.

图为人体在某项生理过程中发生的化学反应示意图．