题目

某同学进行了硫代硫酸钠与硫酸反应的有关实验，实验过程的数据记录如下（见表格），请结合表中信息，回答有关问题： 实验 序号反应温 度/℃参加反应的物质 Na2S2O3H2SO4H2O V/mLc/mol·L−1V/mLc/mol·L−1V/mL A20100.1100.10 B2050.1100.15 C20100.150.15 D40100.1100.10 （1）写出反应的离子方程式_____________________。 （2）根据你所掌握的知识判断，在上述实验中，反应速率最快的可能是______（填实验序号）。 （3）在比较某一因素对实验产生的影响时，必须排除其他因第二节：完形填空（共 20 小题；每小题 1.5 分，满分 30 分）　　阅读下面短文，掌握其大意，然后从 36－55 各题所给的四个选项（A、B、C和D）中，选出最佳选项。Telling the truth is a very good habit. If you  36  speak the truth, you can save yourself from a lot of  37 ! Here is a story of a man who did a lot of  38  things, but his promise to tell the truth 39  him.Once a man came to a  prophet（预言家）and said, “Oh, prophet, I have many bad  40. Which one of them should  I  41  first？”The prophet said, “Give up telling  42  first and always speak the truth. ”The man promised to do so and went home.At night the man was about to go out to steal. Before setting out , he thought for a moment about the  43  he made with the prophet.  “44  tomorrow the prophet asks me where I have been, what shall I say？Shall I say that I went out  45？No, I cannot say that. But nor can I lie. If  I tell the truth,  46  will start hating me and call me a thief. I would be  47  for stealing.”So the man  48  not to steal that night, and  gave up this bad habit.Next day, he  49  drinking wine. When he was about to do so, he said to himself, “What shall I say to the prophet if he asks me what I did during the day？I cannot tell a lie, and if I speak the truth people will  50 me, because a Muslim is not  51  to drink wine.” And so he gave up the  52 of drinking wine.In this way,  53  the man thought of doing something bad, he  54  his promise to tell the truth. One by one, he gave up all his bad habits and became a very  55  person.36、A、always                    B、hardly                    C、sometimes        D、never37、A、time                  B、money                    C、trouble            D、energy38、A、great                  B、bad                        C、strange            D、stupid39、A、educated             B、bothered             C、tested              D、saved40、A、habits                     B、friends                    C、purposes          D、collections41、A、take in                B、bring back                 C、give up            D、depend on42、A、stories                B、truths                        C、reasons            D、lies43、A、plan                   B、secret                        C、promise           D、mistake44、A、Because              B、Unless                    C、Since               D、If45、A、stealing              B、drinking             C、walking           D、dancing46、A、none                  B、someone                 C、anyone            D、everyone47、A、controlled           B、admired                  C、punished          D、killed48、A、refused              B、tried                  C、decided            D、agreed49、A、talked about        B、felt like            C、adapted to(适应)  D、broke down50、A、understand              B、like                    C、hate              D、respect51、A、allowed             B、encouraged             C、invited             D、advised52、A、chance                    B、disadvantage       C、adventure      D、idea53、A、wherever            B、whenever            C、whatever          D、however54、A、forgot                    B、doubted                  C、regretted          D、remembered55、A、good                  B、attractive            C、practical     D、generous(慷慨的)