填空题Before you speak to any audience, you should learn as much about its members as possible. Only in that way can you best adapt the level of your language and the content of your talk to your listeners. 41. Speaking to someone you know well.__________ Where are you likely to speak? Certainly, in this class you'll give several talks, and since you know most, if not all, of the students, you should face no major problems in adapting your approach to them. Another speaking possibility exists in your workplace. A third speaking possibility exists in any organization (social, cultural, athletic, and so on) that you belong to. You may be asked to speak at the next meeting or at the annual banquet. Here again, you know the people involved, their background, their education level, and their attitudes, and that's a tremendous advantage for you. Since we're upbeat and positive in this course, we'll assume that you've given successful talks under all three circumstances, and with this course under your belt, you can do it again. Since good speakers are hard to find and word about them travels fast, suppose that one day you get an invitation to speak to an organization in which you don't know a soul. What do you do now? If you feel able to handle the topic you're asked to speak on, accept this rare challenge. Here's where audience analysis comes into play. Be sure to ask the person who invited you for information on the members, information that encompasses a broad spectrum, such as in the following areas. 42. How old are your listeners? 43. Sex composition of your listeners. 44. Interest in topic.__________ 45. Interests or hobbies of the listeners.__________ [A] If you're invited to speak to a women's or men's organization, you know the answer to this question at once. Quite often, however, audiences are mixed fairly evenly, although at times one sex may predominate. [B] Do members of your prospective audience spend evenings watching TV movies and drinking beer at a local tavern, or do they read the Harvard Classics and attend concerts of Beethoven and Mozart? Do they play bingo and 21, or do they pursue the questions the intriguing intricacies of contract bridge and chess? Answers to these questions can help you choose the most appropriate material and language for your audience. Your choices can be crucial in determining the success or failure of your presentation. [C] Are the members recent college graduates, senior citizens, or business executives in midcareer? Just remember, age exerts a powerful impact on people's attitudes, values and motivations. [D] For example, your department manager may ask you to explain and demonstrate a procedure to some fellow employee. Or she may select you to address your department on behalf of the local blood donor drive. In both speech situations—in class and on the job—you're familiar with your audience; you speak their language; you have things in common with them. [E] Are you aware of the educational background of your audience? How many of them have doctoral degrees, master degrees or bachelor degrees? This will decide what kind of language you should adopt and how much they can understand. [F] Are the members of the organization interested in the topic or are they required to attend regardless of their interest? If the latter is true, what types of material will most likely pique their curiosity?

填空题已知且，则________．

填空题使不等式成立的x的范围是______．

填空题设y=x 3 +2，则y"=______．

填空题设向量=(1,1,3)，=(1,-1,1)，矩阵A=T，则矩阵A的非零特征值为________

填空题设z=x 2 +y 2 -xy，则dz=______．

填空题曲面z-e z +2xy=3在点(1，2，0)处的切平面方程为______

填空题设y=x(x+1)(x+3)(x+5)(x+7)+x10+e10，则y(10)=______．

填空题y″-2y′-3y=0的通解是______．

填空题函数y=ln(arcsinx)的连续区间为______．

填空题设y=2 2arccosx ，则dy=______．

填空题设α 1 =(1，2，-1，0) T ，α 2 =(1，1，0，2) T ，α 3 =(2，1，1，a) T ，若由α 1 ，α 2 ，α 3 生成的向量空间维数为3，则a应满足______．

填空题已知f(x)的一个原函数为xe -x +1，求∫f(x)dx=______。

填空题设函数f(x)=则函数f[f(x)]=______．

填空题某项工程，由甲、丙合做5天能完成全部工程的．(1)此工程由甲、乙两队合做6天完成，如果单独做，甲比乙快5天完成；(2)此工程由乙、丙两队合做10天完成，如果单独做，丙比乙慢15天完成．

填空题设，则y(n)=______。

填空题设y=cosx，则dy=______．

填空题若的原函数F(x)的表达式中，(Ⅰ)不包含对数函数；(Ⅱ)不含反正切函数，则其中的常数a和b分别满足条件______．