请阅读下面素材，简要回答素材中体现了信息的哪些特征并解释说明。姜维问曰：“若大军退，司马懿乘势掩杀，当复如何”孔明曰：“吾今退军，可分五路而退。今日先退此营，假如营内一千兵，却掘二千灶，明日掘三千灶。后日掘四千灶：每日退军，添灶而行。”杨仪曰：“昔孙膑擒庞涓，用添兵减灶之法而取胜；今丞相退兵，何故增灶”孔明曰：“司马懿善能用兵，知吾兵退，必然追赶；心中疑吾有伏兵，定于旧营内数灶；见每日增灶，兵又不

第一篇 Volunteers are being recruited(征募) to eat raw potatoes in the first human trials of a vaccine grown in genetically engineered vegetables. Researchers in Texas hope that people who eat the potatoes will be protected against common gut(肠，肠子) infections. They believe this technique could prove to be a cost-effective way of growing vaccines in developing countries where such diseases are still killers. Other researchers previously succeeded in using similar techniques to produce potential vaccines Now Hugh Mason and his colleagues at Texas A & M University(得克萨斯农业及机械大学) their plant vaccines on mice and plan to recruit 15 volunteers for a human trial. The team first tested the technique in tobacco plants. They took a strain of Escherichia coli(大肠杆菌) bacteria that causes food poisoning, and identified the part of the poison which binds to its victims gut cells. They then used a modified plant bacterium called Agrobacterium tumefasciens to transfer the segment of DNA which manufactures the binding protein into the tobacco plant. Under normal circumstances, these bacteria transfer packets of DNA into plant cells to force the plant to manufacture the nutrients they need. But in the modified bacteria, the DNA package includes the gene to pro- duce the binding protein. Once the foreign DNA segment was incorporated(结合，合并) into the tobacco's own DNA, the bacteria were killed off with antibiotics. Mason's team then grew these modified tobacco plants and found that they produced the E. coli binding protein. Proof of success came when the tobacco leaves were mashed up(捣碎) and squirted into the stomachs of mice. Mason says that within days the mice started producing specific antibodies to the E. coli poison, but suffered no ill effects from digesting the binding protein. Mason then produced genetically engineered potatoes and fed these to mice, with similar results. Mason's team have used plants to produce vaccines against a number of other infectious agents. For example, they have made a vaccine using a protein from the shell of the Norwalk virus, which causes diarrhoea(腹泻) in children. A third vaccine has also been produced in tobacco using a surface protein from the hepatitis B virus. But Mason says that so far they have only been able to produce small amounts of it in potatoes. Although a vaccine already exists against hepatitis B, a cheaper plant version could make mass immunisation(群众性免疫) possible. One problem with growing potatoes to produce vaccines is that cooking tends to destroy the protein component of the vaccine, so they must be eaten raw. Mason thinks that bananas may be a better option. "One banana could potentially produce a whole host of different vaccines," says Mason. The purpose of this text is______。 A. to prove that doctors don't like vegetables B. to amuse the reader by telling some funny things C. to describe how vegetables can grow vaccines for their own use D. to tell the reader about a cheaper way of growing vaccines

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在使用音频处理软件录制声音素材时，常使用采样降噪法来降低声音素材中的噪音。请简要说明采样降噪法的基本原理。

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案例题141.在上语言课时，刘老师先让学生自行阅读及体会今天的语言素材，然后提问:“读完今天的语言素材之后有什么感受？”于是学生甲举手发言，刘老师点评道:“这位同学的回答不是很好，也不完整，哪位同学来补充一下？”这时，甲同学羞得满脸通红，而班里其他学生也不再举手发言，教室里鸦雀无声。[问题]（1）请分析教室里“鸦雀无声”的原因。（2）请对刘老师的“点评”进行评价

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范例教学法是信息技术学科课堂教学中最常用的方法之一．请简要回答教师在使用范例教学法进行教学时，所选择的范例应该具备哪些基本特点（10分）范例教学法是信息技术学科课堂教学中最常用的方法之一．请简要回答教师在使用范例教学法进行教学时，所选择的范例应该具备哪些基本特点（10分）

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请简要回答为确保信息质量，在采集信息时应遵循的基本原则。请简要回答为确保信息质量，在采集信息时应遵循的基本原则。

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请简要回答信息技术的发展所经历的五次重大变革。请简要回答信息技术的发展所经历的五次重大变革。

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调色练习作业：请从下列素材中挑选4张照片，分别完成2张日系色调，2张韩系色调。要求：1、请将调色效果和源素材排版后上传至答案框中，并简要写出你的调色想法。 2、将psd和jpg文件放置以自己名字命名的文件夹中，压缩进行上传。

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