问题
填空题
（2011年四川内江，2题）纯碱属于盐类物质，用PH试纸测定某浓度的纯碱溶液其PH为10，请说明该溶液呈 性，能使紫色石蕊试液变成 色。
答案
碱性 蓝色
纯碱属于盐类物质，用pH试纸测定某浓度的纯碱溶液其pH为10，则可推测其pH大于7，则可知其溶液呈碱性；而紫色石蕊试液遇酸变红，遇碱变蓝，故能使紫色石蕊试液变成蓝色．
故答为：碱、蓝
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（2011年四川内江，2题）纯碱属于盐类物质，用PH试纸测定某浓度的纯碱溶液其PH为10，请说明该溶液呈 性，能使紫色石蕊试液变成 色。
碱性 蓝色
纯碱属于盐类物质，用pH试纸测定某浓度的纯碱溶液其pH为10，则可推测其pH大于7，则可知其溶液呈碱性；而紫色石蕊试液遇酸变红，遇碱变蓝，故能使紫色石蕊试液变成蓝色．
故答为：碱、蓝
“Forgiveness is the sweetest revenge.” I saw this wonderful old saying again in a book recently. It got me thinking about all the times that I have been 31 to forgive others in my life and all the joy that it has brought me. One 32 stands out particularly well. I was a young boy at a summer camp. I was having a great time and 33___ everything about it except for another young boy of my age. To say we didn’t 34 would be a statement that made the situation less serious than it really was. We spent most of the week irritating, insulting (侮辱), and picking on each other. 35 finally came to a fight on the next to last day of camp. We got into a fist fight which I lost. 36 older boys broke it up before I was hurt too much. I spent the rest of the day alone, refusing to speak andlost in my own 37 . The next day my spirits were 38 when Mom brought the boys in our cabin some of her delicious homemade 39 . I was enjoying a few slices of it when I saw the other boy sitting by himself at the bottom of the steps outside. He seemed very 40 right then. I am not sure what moved me to do so, but I took my pizza down and 41 it with him. It made all the anger and pain inside me 42 . We became friends after that. I never got into another fist fight either. I had found out that sharing and forgiving were much more fun and a lot less painful. Forgiveness is 43 the sweetest revenge. It can turn an enemy into a friend. It can 44 a heart from the chains of anger, hatred, and pain. It can open a soul to the sweetness of love and joy once again. May your life always be 45 of sweet forgiveness.
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