题目

V mLAl2(SO4)3溶液中含有Al3+ a g，取V mL溶液稀释到4V mL，则稀释后溶液中S042－的物质的量浓度是（    ） A．mol/L                   B．mol/L       C．mol/L                   D．mol/L 答案：CEvery morning my friend would stop on the way to work to have a quick breakfast with her 8-year-old son. Then she   36   him off at school. They ate the same thing every morning: an egg sandwich, juice, coffee for her, and milk for him.        One day she ordered a(n)   37   breakfast. Once they finished eating and were heading out of the door, she   38  , said good morning to a homeless man sitting outside of the   39  , and gave him the breakfast she had ordered for him. He   40   her, telling her it was his first meal during the last several   41  . She couldn’t help but feel   42   and was glad she finally took   43  .        She told her son that she had seen the man every day that week there and that   44  , herself included, had offered him   45  , support, food, or drink. She   46   explained that homelessness could happen to anyone and that it was important to   47   needy people.        So her “Tradition of Kindness”   48  . Each day she and her son went on to   49   the homeless man breakfast. The   50   was kept until they moved away several years later,   51   the experience was firmly put into her son’s mind.        My friend   52   every time she tells me that this “Tradition of Kindness” goes on with her son, who remembers this   53   tradition. Now working in a company, her son stops every morning at Starbucks for a coffee and offers a homeless person a breakfast before going to the   54  .        What a great tradition that he can   55   to his children as well! 1.A. sent                      B. dropped               C. called             D. drove 2.A. light                            B. expensive             C. ordinary          D. extra 3.A. stopped                 B. escaped                C. backed        D. hid 4.A. shop                            B. market                        C. hotel            D. restaurant 5.A. recognized             B. refused                 C. thanked        D. found 6.A. days                      B. minutes                C. months         D. weeks 7.A. cold                      B. good                    C. strange          D. nervous 8.A. action                   B. time                     C. care                    D. effect 9.A. everyone               B. someone               C. no one             D. anyone 10.A. education                    B. information                 C. comfort               D. safety 11.A. again                   B. further                        C. once                   D. first 12.A. contact                B. encourage             C. follow             D. help 13.A. began                  B. existed                        C. failed               D. changed 14.A. win                            B. buy                      C. show                  D. award 15.A. promise               B. agreement            C. order               D. practice 16.A. although                     B. so                        C. but                   D. because 17.A. cries                        B. jumps                  C. jokes                  D. smiles 18.A. school                 B. childhood             C. youth                  D. adulthood 19.A. office                  B. cinema                 C. store                   D. library 20.A. connect            B. relate                   C. pass                    D. move