Purchasing Management.ppt
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1、uld it be a pie chart or stacked-bar chart instead? By asking such questions, you continually compare your visual aid to the message you want it to convey. 6 Not letting visual aids do their work. Presenters make fascinating mistakes with visual aids: Blocking the screen with their bodies Talking to
2、 the screen rather than the audience Putting slides on an overhead pro- jector upside-downand never noticing Displaying a slide for ten seconds or lessnot enough time for its message to sink in Since you spend so much time develop- ing an effective slide, make sure you let it do its work while you d
3、o yours. Prac- tice to make the following physical actions become second nature: Stand where most of the audience can see both you and the screen Glance at each slide to make sure its correct, then turn to address the audience As you speak, check your audiences faces to see that the slide has regis-
4、 tered with them 7 Presenting without passion. Despite an ever-growing array of com- munication options, presentations remain essential to the business world. Why? In part, a presentation allows interaction between audience and pre- senter, and among audience members who can develop team spirit. But
5、 mainly, a presentation is an in-person experience. Its not just your words and visuals that make your presentation, but you. The audience will judge your credibility, substance, and passion and theyve come to the presentation because they can best make those judg- ments in person. When you stand up
6、 in front of a crowd, you must believe that youre telling them something important. When the audience feels your trust and faith in the topicif you have been effective in communicating ityou pass the implicit test they came to this room to give you. Your presentation suc- ceeds. john clayton is a wr
7、iter and teacher at Rocky Mountain College in Billings, Montana. 4 Presentations 101, continued We have diagrams,charts,and maps in our heads. Why should you translate them into words and force your audience to translate them back to visuals? )酒后驾车是引发交通事故的重要原因。交警对驾驶员进行呼气酒精检测的原理是:橙色的K2Cr2C7酸性水溶液乙醇迅速生
8、成蓝绿色Cr3+。下列对乙醇的描述与此测定原理有关的是( )乙醇沸点低 乙醇密度比水小 乙醇有还原性 乙醇是烃的含氧化合物AB C D6.(2010浙江卷) 核黄素又称为维生素B2,可促进发育和细胞再生,有利于增进视力,减轻眼睛疲劳。核黄素分子的结构为:已知:有关核黄素的下列说法中,不正确的是:( )A.该化合物的分子式为C17H22N4O6 B.酸性条件下加热水解,有CO2生成C.酸性条件下加热水解,所得溶液加碱后有NH3生成 D.能发生酯化反应7.(2010福建卷)下列关于有机物的正确说法是( )A聚乙烯可发生加成反应 B石油干馏可得到汽油、,煤油等C淀粉、蛋白质完全水解的产物互为同分异构
9、体D乙酸乙酯、油脂与NaOH溶液反应均有醇生成。8.(2010江苏卷)阿魏酸在食品、医药等方面有着广泛用途。一种合成阿魏酸的反应可表示为下列说法正确的是(双选) ( ) A可用酸性KmnO4溶液检测上述反应是否有阿魏酸生成B香兰素、阿魏酸均可与Na2CO3、NaOH溶液反应C通常条件下,香兰素、阿魏酸都能发生取代、加成、消去反应D与香兰素互为同分异构体,分子中有4种不同化学环境的氢,且能发生银镜反应的酚类化合物共有2种9(09广东理科基础31)下列说法不正确的是 ( ) A苯和乙烯都能与H2发生加成反应 B蔗糖在人体内水解的产物只有葡萄糖 C食醋中含有乙酸,乙酸可由乙醇氧化得到 D煤可与水蒸气
10、反应制成水煤气,水煤气的主要成分为CO和H210.(09海南卷)已知某氨基酸的相对分子质量小于200,且氧的质量分数约为0.5,则其分子中碳的个数最多为: ( ) A5个 B6个 C7个 D8个模拟演练1.乙醇的熔沸点比含相同碳原子的烷烃的熔沸点高的主要原因是( ) A乙醇的分子量比含相同碳原子的烷烃的分子量大 B乙醇分子之间易形成氢键C碳原子与氢原子的结合没有碳原子与氧原子的结合的程度大D乙醇是液体,而乙烷是气体2.A、B、C三种醇同足量的金属钠完全反应,在相同条件下产生相同体积的氢气,消耗这三种醇的物质的量之比为2:6:3,则A、B、C三种醇的羟基数之比为( ) A3:2:1B3:1:2C
11、2:1:3D2:6:33.下列关于有机物的说法正确的是 ( )A乙醇、乙烷和乙酸都可以与钠反应生成氢气B75%(体积分数)的乙醇溶液常用于医疗消毒C苯和乙烯都可使溴的四氯化碳溶液褪色D石油分馏可获得乙酸、苯及其衍生物4.近两年流行喝苹果醋,苹果醋是一种由苹果发酵而成的具有解毒、降脂、减肥和止泻等明显药效的健康食品苹果酸(羟基丁二酸)是这种饮料的主要酸性物质,苹果酸的结构式为,下列说法不正确的是( )A苹果酸在一定条件下能发生酯化反应 B苹果酸在一定条件下能发生催化氧化反应C苹果酸在一定条件下能发生消去反应 D1 mol苹果酸与Na2CO3溶液反应最多消耗3 mol Na2CO35.实验室用乙酸
12、、乙醇、浓H2SO4制取乙酸乙酯,加热蒸馏后,在饱和Na2CO3溶液上面得到无色油状液体,当振荡混合时,有气泡产生,原因是 ( )A产品中有被蒸馏出的H2SO4 B有部分未反应的乙醇被蒸馏出来C有部分未反应的乙酸被蒸馏出来 D有部分乙醇跟浓H2SO4作用生成乙烯6.下列说法正确的是( )A. 乙烯的结构简式可以表示为CH2CH2 B. 苯、乙醇、乙酸都能发生取代反应C. 蛋白质、纤维素、蔗糖、淀粉、PVC都是高分子化合物D.棉、麻、丝、毛及合成纤维完全燃烧都只能生成CO2 和 H2O7.以乙醇为原料,用下述6种类型的反应:氧化;消去;加成;酯化;水解;加聚,来合成乙二酸乙二酯(结构简式如图所示
13、)的正确顺序是( )A.B. C.D. 8.(2011杭州期中模拟)浙江是丝绸的故乡,丝绸由蚕丝加工而成,蚕丝丝质纤细,具有柔软光滑的手感、丰满轻盈的外观,而且吸湿透气、冬暖夏凉。下列说法正确的是( )A蚕丝是约18种-氨基酸以肽键相连的高分子缩合物 B灼烧丝绸与羊毛气味不同C丝绸衣物可用加酶洗衣粉洗涤 D丝绸与双缩脲试剂作用显蓝紫色9.(2011重庆一中月考)下列操作中正确的是( )A.除去乙酸乙酯中的少量乙酸:加入乙醇和浓硫酸将乙酸全部转化为乙酸乙酯B. 除去C2H5OH中的少量CH3COOH:加足量CaO,蒸馏C. 用KMnO4酸性溶液鉴别CH3CHCHCH2OH和CH3CH2CH2CH
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