题目

当今社会“感恩”话题盛行，总有一些有关感恩的人和事会让我们思考良久。这篇阅读表达题会给我们一些很好的启示，让我们有深深的感悟。 Our little boy came up to his mother in the kitchen one evening while she was fixing supper，and handed her a piece of paper that he had been writing on. After his mom dried her hands on an apron，she read it，and this is what it said：For cutting the grass $5. 00For cleaning up my room this week $1. 00For going to the store for you $0. 50 Baby－sitting my kid brother while you went shopping $0. 25 Tak在数轴上，点A所表示的实数是-2，⊙A的半径为2，⊙B的半径为1，若⊙B与⊙A外切，则在数轴上点B所表示的实数是（ ）A．1B．-5C．1或-5D．-1或-3