问题 选择题

(7分)自2009年3月起,从墨西哥、美国等国逐渐扩散到全世界的甲型H1N1型流感暴发疫情,引起了全球关注和积极应对。防控专家表示,含氯消毒剂和过氧化物等强氧化性消毒剂可防甲型H1N1流感。

(1)过碳酸钠是一种有多用途的新型氧系固态漂白剂,化学式可表示为Na2CO3·3H2O2,它具有Na2CO3和H2O2的双重性质。①H2O2有时可作为矿业废液消毒剂,有“绿色氧化剂”的美称;如消除采矿业胶液中的氰化物(如KCN),经以下反应实现:KCN+H2O2+H2O===A+NH3↑,则生成物A的化学式为           ,H2O2被称为“绿色氧化剂”的理由是            。②某强酸性反应体系中,反应物和生成物共六种物质:O2、MnO-4、H2O、Mn2+、H2O2、H+。已知该反应中H2O2只发生了如下过程:H2O2→O2。写出该反应的离子方程式(不必配平):                                

(2)漂白剂亚氯酸钠(NaClO2)在常温与黑暗处可保存一年。亚氯酸不稳定可分解,反应的离子方程式为:HClO2→ClO2↑+H++Cl-+H2O(未配平)。在该反应中,当有1molClO2生成时转移的电子个数是               

答案

(7分)

(1)(5分)①KHCO3(1分)H2O2是氧化剂,其产物是H2O;H2O没有污染性(2分)

②2MnO-4+5H2O2+6H+→2Mn2++8H2O+5O2↑(未配平的扣分)(2分)

(2)(2分)

四、(本大题包括1个小题,共14分)

选择题
完形填空

第四节 信息匹配(共5小题;每小题2分,满分10分)

Jack 等五人想通过查书来解决有关远程教育的问题,请选出符合各人需求的最佳选项。

This is a collection of articles about different online learning applications in school and provides a good overview of what teachers and students are doing in real situation.

This is a very reliable introduction to distance learning which focuses on the use of television. The principle and ideas discussed really apply to any form of distance education.

A good introductory book for teachers that explains what distance learning is and how to put it into practice.

A useful discussion of issues associated with distance training and how to avoid the shortcomings of online teaching and how to deal with the problems caused by online teaching.

An excellent summary of past research and current practice in online learning written by a group of pioneers in the field. They have written a number of important books about their work before.

A scholarly textbook about distance education that presents the history and theory of the field. It also covers the basic principles and issues of distance education.

现在,请阅读以下信息,根据他们的实际情况,进行信息匹配。请在答题卡上将对应题号的相应选项字母涂黑。

56. Jack is writing an article about distance teaching. He doesn’t care when the book was written but he hopes the book covers all the topics about it.

57. Mrs. Hill is a teacher. She doesn’t know how to make her online teaching better and how to deal with some unexpected problems during online teaching.

58. Mr. Lincoln is an old teacher. He knows nothing about distance teaching. He hopes to find a book that can teach him all the things –from basic knowledge to advanced knowledge.

59. Cathy is a new teacher. She wants to learn to use TV in her teaching. She is not good at technology.

60. George is a new teacher and he wants to know how other teachers are carrying out online learning.