题目

有一包白色固体，可能由氯化钠、硫酸铜、氯化钡、硝酸钠、碳酸钠、硫酸钠中的一种或几种组成，进行如下实验：①将粉末溶于水，得到白色沉淀和无色滤液；②过滤，在白色沉淀中加入稀硝酸，沉淀一部分消失，并生成气泡；③在滤液中加入硝酸银溶液，生成白色沉淀，加稀硝酸，沉淀不消失。 则原液中一定有                        。一定没有                。可能有的为                          。 ②中的反完形填空（共20小题；每小题1.5分，满分30分）阅读下面短文，从短文后各题所给四个选项（A、B、C、D）中选出可以填入空白处的最佳选项。 My mother seemed to be able to make dolls (洋娃娃) out of anything. She made some dolls for me and my two elder sisters. I 36 playing with them, but still, secretly, I hoped for a store-bought 37 like the one our rich cousin had. Her doll 38 open and close its blue glass eyes and even say "Mamma". I 39 stopped admiring it and hoping to have one.However, my dream 40 came true when I was six. One day my father came back from his business trip with three 41 dolls! They were much smaller than our cousin’s doll and their eyes were just painted ones, but I did not 42 such differences. They were 43 "store-bought" dolls. We each chose one and I named 44 Misako.Soon my sisters and I became 45. Our "children" kept us 46 all day. We gave them a bath, 47 them, brushed their hair, took them out for a walk and put them to bed. Several months later, they got more like real children — their 48 and bodies became dirtier; their dresses got stained; their hair less smooth.But, by then, 49 interests seemed to have moved into 50 toys. Their dolls were abandoned (被抛弃) and in bad condition. One had 51 one of her arms, and 52 was one-legged. "You can 53 them if you want," my sisters said to me. Thus, I had 54_ dolls. They were more or less handicapped (残疾) and they often looked at me as if they needed me to 55 them. I enjoyed this feeling of being needed — being the only one in the world who could protect them with a lot of love. Indeed, they made the rest of my childhood days very happy.36. A. wanted       B. expected           C. hoped                         D. enjoyed37. A. doll              B. toy                C. girl                            D. baby38. A. might         B. should              C. could                         D. dared39. A. often         B. never              C. sometimes                D. seldom40. A. immediately B. firstly                C. hardly                        D. finally 41. A. beautiful    B. lovely               C. store-bought            D. new 42. A. care about           B. care for             C. think about             D. worry about 43. A. total         B. real                    C. like                            D. true 44. A. my         B. one                  C. them                        D. mine45. A. sisters      B. fathers                      C. friends                D. mothers46. A. free          B. busy             C. hard                   D. tired47. A. wore        B. put on           C. dressed               D. wash48. A. faces        B. legs                C. arms                  D. hands 49. A. my           B. their                        C. my sisters’            D. my doll’s50. A. tiny                  B. different          C. curious                      D. humorous51. A. lost         B. wounded          C. cut                   D. damaged 52. A. the other    B. another          C. it                     D. other 53. A. look out for   B. take care of         C. pay attention to     D. have a look at54. A. two          B. few                    C. many                   D. three55. A. teach        B. feed               C. satisfy                 D. help