问题
选择题
某温度下，相同pH值的盐酸和醋酸溶液分别加水稀释，平衡pH值随溶液体积变化的曲线如下图所示。据图判断正确的是
A.Ⅱ为盐酸稀释时pH值变化曲线高
B.b点溶液的导电性比c点溶液的导电性强
C.a点Ka的数值比d点Ka的数值大
D.b点酸的总浓度大于a点酸的总浓度
答案
答案：B
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某温度下，相同pH值的盐酸和醋酸溶液分别加水稀释，平衡pH值随溶液体积变化的曲线如下图所示。据图判断正确的是
A.Ⅱ为盐酸稀释时pH值变化曲线高
B.b点溶液的导电性比c点溶液的导电性强
C.a点Ka的数值比d点Ka的数值大
D.b点酸的总浓度大于a点酸的总浓度
答案：B
1.In which column of a newspaper could we find this advertisement? A.Arts. B.Sales. C.Jobs. D.News. 2.One of the duties of the person to be appointed is_________. A.taking charge of research work B.seeking membership for the trade union C.mannaging a team of three or four members D.runing a telecommunications company 3.If you apply for this position, you can do all EXCEPT_________ A.ask an agency for an application form B.dial 020 8971 7482 for more information C.email hr@ cwu.org for an application pack D.send in your application before 4th August 2010 4.Which of the following applieans is most likely to be employed? A.A school teacher with a master’s degree. B.A university graduate majoring in computer science. C.A director from a research center with a master’s degree. D.A clerk from the telecommunications company |
team; good research skills, holding a good degree in a related subject or other similar experience; a high level of mathematical and calculating skills; the ability to produce high quality work under pressure; a commitment to and knowledge of the trade union movement and social demotic politics; and knowledge and/or experience of the postal and/or telecommunications industry。