Unit 1 College  Life

Self-assessment

1、单选题:
‍Section B​‍Directions: In this part there is a passage followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice.​‍ ​I’ve been writing for most of my life. The book Writing Without Teachers introduced me to one distinction and one practice that has helped my writing processes tremendously. The distinction is between the creative mind and the critical mind. While you need to employ both to get to a finished result, they cannot work in parallel no matter how much we might like to think so.​Trying to criticize writing on the fly is possibly the single greatest barrier to writing that most of us encounter. If you are listening to that 5th grade English teacher correct your grammar while you are trying to capture a fleeting (稍纵即逝的) thought, the thought will die. If you capture the fleeting thought and simply share it with the world in raw form, no one is likely to understand. You must learn to create first and then criticize if you want to make writing the tool for thinking that it is.​The practice that can help you past your learned bad habits of trying to edit as you write is what Elbow calls “free writing.” In free writing, the objective is to get words down on paper non-stop, usually for 15-20 minutes. No stopping, no going back, no criticizing. The goal is to get the words flowing. As the words begin to flow, the ideas will come from the shadows and let themselves be captured on your notepad or your screen. Now you have raw materials that you can begin to work with using the critical mind that you’ve persuaded to sit on the side and watch quietly. Most likely, you will believe that this will take more time than you actually have and you will end up staring blankly at the pages as the deadline draws near.​Instead of staring at a blank start filling it with words no matter how bad. Halfway through your available time, stop and rework your raw writing into something closer to finished product. Move back and forth until you run out of time and the final result will most likely be far better than your current practices.​‍ ​‍21 When the author says the creative mind and the critical mind “cannot work in parallel” (Line 3, Para. 1) in the writing process, he means ________.​‍​
选项:
A: no one can be both creative and critical 
B: they cannot be regarded as equally important
C:  they are in constant conflict with each other
D: one cannot use them at the same time
答案: 【 one cannot use them at the same time点我阅读全文

第1周 二极管及整流电路

第1周单元测验

1、单选题:
‏N型半导体以(  )导电为主。‍
选项:
A: 电压
B: 离子
C: 空穴
D: 电子
答案: 【 电子点我阅读全文

第一章财政概述

第一章财政概述测验

1、单选题:
‎财政分配的目的是(  )‌
选项:
A: 满足政府的需要
B: 满足社会公共需要
C: 满足企业的需要
D: 满足个人的需要
答案: 【 满足社会公共需要点我阅读全文

第二单元 职业道德

随堂测验1

1、单选题:
‎从业人员爱岗敬业的基本要求是(     )‎
选项:
A: 无私奉献
B: 干一行、爱一行、专一行
C: 即使不喜欢某个工作,也得表现出喜欢的样子
D: 对得起良心,拿工资问心无愧
答案: 【 干一行、爱一行、专一行点我阅读全文

第1周

随堂测验1

1、判断题:
​将一枚硬币抛一次,观察正面出现的次数. 则样本空间为S={0,1}.‌
选项:
A: 正确
B: 错误
答案: 【 正确点我阅读全文

第一章 绪论

第一章测验

1、多选题:
‎大地测量学按研究的地球空间的范围大小,可分为(  )。‍
选项:
A: 椭球大地测量学 
B: 大地控制测量学
C: 海洋大地测量学
D: 工程大地测量学
E: 物理大地测量学
答案: 【 椭球大地测量学 ;
大地控制测量学;
海洋大地测量学;
工程大地测量学
点我阅读全文

Lesson 2

Scanning

1、单选题:
‎Read the passage "The Discovery of X-rays" quickly and choose the paragraph(s) which contain(s) the answer(s). You may choose more than one answer for question 3. ​
‎​
The Discovery of X-rays​
‎ ​
Par. 1 Except for a brief description of the Compton effect, and a few other remarks, we have postponed the discussion of X-rays until the present chapter because it is particularly convenient to treat X-ray spectra after treating optical spectra. Although this ordering may have given the reader a distorted impression of the historical importance of X-rays, this impression will be corrected shortly as we describe the crucial role played by X-rays in the development of modern physics.​
Par. 2 X-rays were discovered in 1895 by Roentgen while studying the phenomena of gaseous discharge. Using a cathode ray tube with a high voltage of several tens of kilovolts, he noticed that salts of barium would fluoresce when brought near the tube, although nothing visible was emitted by the tube. This effect persisted when the tube was wrapped with a layer of black cardboard. Roentgen soon established that the agency responsible for the fluorescence originated at the point at which the stream of energetic electrons struck the glass wall of the tube. Because of its unknown nature, he gave this agency the name X-rays. He found that X-rays could manifest themselves by darkening wrapped photographic plates, discharging charged electroscopes, as well as by causing fluorescence in a number of different substances. He also found that X-rays can penetrate considerable thicknesses of materials of low atomic number, whereas substances of high atomic number are relatively opaque. Roentgen took the first steps in identifying the nature of X-rays by using a system of slits to show that (1) they travel in straight lines, and that (2) they are uncharged, because they are not deflected by electric or magnetic fields.​
Par. 3 The discovery of X-rays aroused the interest of all physicists, and many joined in the investigation of their properties. In 1899 Haga and Wind performed a single slit diffraction experiment with X-rays which showed that (3) X-rays are a wave motion phenomenon, and, from the size of the diffraction pattern, their wavelength could be estimated to be 10-8 cm. In 1906 Barkla proved that (4) the waves are transverse by showing that they can be polarized by scattering from many materials.​
Par. 4 There is, of course, no longer anything unknown about the nature of X-rays. They are electromagnetic radiation of exactly the same nature as visible light, except that their wavelength is several orders of magnitude shorter. This conclusion follows from comparing properties 1 through 4 with the similar properties of visible light, but it was actually postulated by Thomson several years before all these properties were known. Thomson argued that X-rays are electromagnetic radiation because such radiation would be expected to be emitted from the point at which the electrons strike the wall of a cathode ray tube. At this point, the electrons suffer very violent accelerations in coming to a stop and, according to classical electromagnetic theory, all accelerated charged particles emit electromagnetic radiations. We shall see later that this explanation of the production of X-rays is at least partially correct.​
Par. 5 In common with other electromagnetic radiations, X-rays exhibit particle-like aspects as well as wave-like aspects. The reader will recall that the Compton effect, which is one of the most convincing demonstrations of the existence of quanta, was originally observed with electromagnetic radiation in the X-ray region of wavelengths.​
‎​
‎When were X-rays discovered?​
选项:
A: Par. 1
B: Par. 2
C: Par. 3
D: Par. 4
E: Par. 5
答案: 【 Par. 2点我阅读全文

1.1仪容仪表

随堂测验1

1、单选题:
‏女服务员要淡妆上岗,长发应_________。‎
选项:
A: 剪短
B: 披肩
C: 扎马尾
D: 盘成发髻
答案: 【 盘成发髻点我阅读全文

第1章 多媒体技术基础(第2周)

第1章 单元测验

1、单选题:
__________是指用户接触信息的感觉形式,如视觉、听觉、触觉、嗅觉和味觉等。‎​‎
选项:
A: 感觉媒体
B: 表示媒体
C: 显示媒体
D: 传输媒体
答案: 【 感觉媒体点我阅读全文

第一章 汉字性质、特色及其与传统文化的关系概说

随堂测验1

1、单选题:
世界上现存的最古老的文字是(      )‌‌‎‌
选项:
A: 楔形文字
B: 汉字
C: 玛雅文字
D: 古埃及圣书字 
答案: 【 汉字点我阅读全文