DK-1型电空制动机主司机操纵台部分包括电空制动控制器、空气制动阀、（），充气及消除按钮。

[问答题]So many high school graduates have no clues what they want to pursue as a career as they head off to college. So, here’s the question: How many times have you changed your major(s) while in college and what prompted the change(s)? The following are opinions from all walks of life. Read the excerpts carefully and write your response in about 300 words, in which you should:　　1. summarize briefly the opinions in the excerpts;　　2. give your comment.　　Marks will be awarded for content relevance, content sufficiency, organization and language quality. Failure to follow the above instructions may result in a loss of marks.Never Changed　　Claire | High School Teacher: I actually never changed my major. I declared elementary education immediately and stuck with it. I thought I wanted to minor in math, but before I even took a single math class, I ended up switching to English. Aside from student teaching and a long term sub position in 5th grade immediately following graduation, I’ve actually NEVER taught elementary school. I went ahead and took the Texas exam to get certified k-12 and I’ve only taught high school since. Sometimes I wish I had just done secondary education. Sadly, I don’t actually think any of my education classes in college affected the way I teach—experience has really been the best class I’ve had.　　Kevin | Accountant: I never changed my major in college! I knew exactly what I wanted, where I was going, and what I ultimately hoped to achieve after graduation with my AAS Degree in Business Management/ Accounting, I went directly to work in my chosen profession and never looked back! It served me well for about twenty-five years.　　Murphy | Middle School Teacher: I never changed my major in college, but I did not declare a major until the university forced me to. I majored in Political Science simply because it interested me. Of course, when I did declare this major everyone, especially my patents, asked me what I was going to do with it and my answer was always that I wasn’t sure. I ended up receiving a teaching credential two years after receiving my B.A. in Political Science and have been teaching for the last 26 years.　　Changed　　Dastice | Clerk: I changed my major from Psychology to Sociology. I still minored in Psych, and also in Women’s Studies. My only drive in changing majors was that I enjoyed the classes more. I figured if I stuck with what I enjoyed then a career would somehow emerge from it once I got my degree. Knowing what I know now, however, I probably would have majored in something like business or law. After graduating with my degree I ended up working jobs that didn’t even require a college education. Experience was far more valuable, I was told.　　Jenny | College Student: I, for some reason, never knew majors were a huge deal and could be almost as important as your life. I started out as an arts and Spanish major. I then realized the program my school offered for the education major took care of 4 classes I would have to take for my MA. I dropped the art major and went into the education major. My last semester came and I was at a crossroads: take the final course to complete my major in education or the class to complete my Spanish major. I do get a little upset thinking I was only one class away from another major.　　Gaha | Writer: I changed it once. I started college at eighteen and a little naive as to the working world. I chose to major in Business, not sure why, in fact I don’t think I really even knew what it entailed. It wasn’t until the onset of my junior year that I came to an epiphany that I had only take a couple of business classes because they bored me out of my mind. After taking a look at my transcript, realizing that I was totally into foreign languages and literature, I decided to get into writing. And a new writer was born!

[名词解释题]免疫程序

[多选题]变压器空载试验的目的是测量（）

[单选题]在车站上补票的手续费为（）。

[填空题]被测要素可分为单一要素和关联要素，（）要素只能给出形状公差要求；（）要素可以给出位置公差要求。

[单选题]新的、严重的不良反应应在多少天内报告？（）

[问答题]何谓农业防治法？农业防治法主要包括哪些途径？

[填空题]旅客车票、（）、包裹票和货物运单是合同或者合同的组成部分。

[判断题]所有零部件外露部分必须有防锈手段，镀锌、镀镍、发蓝、油漆等，活动面除外但需要涂润滑油或油脂

[单选题]杜邦体系是以净资产收益率为龙头，以（）为核心，重点揭示企业获利能力及其前因后果。

[填空题]DK-1型电空制动机主司机操纵台部分包括电空制动控制器、空气制动阀、（），充气及消除按钮。

[填空题]DK-1型电空制动机主司机操纵台部分包括电空制动控制器、空气制动阀、（），充气及消除按钮。

[单选题]下列哪一项不属于DK-1电空制动机在主司机操纵台所设设备（）。

[单选题]下列哪一项不属于DK-1电空制动机在主司机操纵台所设设备（）。

[单选题]DK-1制动机，电空位电空制动控制器手柄重联位，重联电空阀259沟通的风路应为（）。

[单选题]DK-1制动机，电空位电空制动控制器手柄重联位，重联电空阀259沟通的风路应为（）。

[填空题]DK-1型电空制动机副司机操纵台部分设置有（）和手动放风塞门。

[填空题]DK-1型电空制动机副司机操纵台部分设置有（）和手动放风塞门。

[单选题]DK-1型制动机，电空控制器手柄置（）位，254排风1电空阀得电，机车制动缓解。

[单选题]DK-1型制动机，电空控制器手柄置（）位，254排风1电空阀得电，机车制动缓解。