慕课标签存档

第一章 社会调查概述

第一章 单元测验

1、单选题：
‎了解和描述社会现象的状况，回答这种社会现象“是什么”，表明了社会调查具有（      ）‍‎‍
选项：
A: 描述功能
B: 解释功能
C: 预测功能
D: 研究功能
答案: 【 描述功能】点我阅读全文

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第一章 中药鉴定的基础知识

第一章测试

1、多选题：
‌1.现代中药分类方法主要有（）‍‌‍
选项：
A: A.按中药功能分类
B: B.按药用部位分类
C: C.按有效成分分类
D: D.按自然属性分类
E: E.按自然系统分类
答案: 【 A.按中药功能分类;
B.按药用部位分类;
C.按有效成分分类;
E.按自然系统分类】点我阅读全文

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光影之术

光影之术MOOC测验

1、单选题：
“建筑艺术的要素是墙和空间，光和影。”此句话出自哪位建筑师？​‏
选项：
A: Ludwig Mies Van der Rohe（密斯·凡·德·罗）
B: Le Corbusier（勒·柯布西耶）
C: Zaha Hadid（扎哈·哈迪德）
D: Tadao Ando（安藤忠雄）
答案: 【 Le Corbusier（勒·柯布西耶）】点我阅读全文

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LevelOneIntroductorySpeech

QUIZ1

1、单选题：
​第一章中提到，言语沟通过程speech communication process的要素有7个。以下【不属于】点我阅读全文

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学习单元一 移动商务视觉设计认知

随堂测试

1、填空题：
‎视觉设计中的视觉元素主要有哪些？​
答案: 【 视觉设计中的视觉元素主要有：点、线、面、图案。】点我阅读全文

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第一讲史前中国

1.1我们从哪儿来——中国的史前社会

1、单选题：
‏在中国发现的最早的古人类化石是：‏
选项：
A: 元谋人化石
B: 禄丰古猿化石
C: 北京人化石
D: 山顶洞人化石
答案: 【 禄丰古猿化石】点我阅读全文

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第二章 个体心理与个体行为（四）

第二章 测试

1、判断题：
‎感觉是客观事物的个别属性在人脑中的直接反映。‎
选项：
A: 正确
B: 错误
答案: 【 正确】点我阅读全文

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模块一 集合的概念与表示方法

模块一 单元测验

1、单选题：
​下列对象能组成集合的是（）​
选项：
A: 小于6的正整数
B: 比较小的数
C: 班级里个子高的同学
D: 班级里学习成绩较好的同学
答案: 【 小于6的正整数】点我阅读全文

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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

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第1章　五四文学革命

第1章自测

1、单选题：
‎             年，综合性的文化批判刊物《新青年》 在上海创刊的。‌
选项：
A: 1989
B: 1917
C: 1916
D: 1915
答案: 【 1915】点我阅读全文

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