mooc答案类别

第一讲民事诉讼法

小测验

1、单选题：
关于民事诉讼法的性质，下列哪一说法是正确的？（  ）（2011年试卷3第35题） ​
选项：
A: 根据其调整的社会关系，民事诉讼法是程序法
B: 根据其在法律体系中的地位，民事诉讼法是程序法
C: 根据其规定的内容，民事诉讼法是程序法
D: 根据公法与私法的划分标准，民事诉讼法是程序法
答案: 【 根据其规定的内容，民事诉讼法是程序法】点我阅读全文

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第一周 C54x DSP技术基础

C54x DSP技术基础_单元测试

1、单选题：
‎对于TMS320C54x系列DSP芯片，下列说法正确的是哪项？‌
选项：
A: 定点DSP
B: 专用DSP
C: 32位DSP
D: 浮点DSP
答案: 【 定点DSP】点我阅读全文

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第0章绪论

单元测试

1、单选题：
‎数字信号是时间和（）都离散的信号‎
选项：
A: 幅值
B: 振幅
C: 频率
D: 幅度
答案: 【 幅值】点我阅读全文

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第1单元 点的运动学和刚体的简单运动

随堂测验1

1、单选题：
‍如果既要研究飞机的飞行轨迹，又要研究飞机的飞行姿态，可以把飞机抽象为_____________来研究。‌
选项：
A: 一个点
B: 一个刚体
C: 一个点或一个刚体
D: 以上答案都不正确
答案: 【 一个刚体】点我阅读全文

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Lesson2

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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ChapterFourPrice

RulesforTradeTerms

1、单选题：
‎Warsaw-Oxford Rules 1932 was developed by International Law Association to set rules for ______.‍
选项：
A: FOB
B: CFR
C: CIF
D: C&F
答案: 【 CIF】点我阅读全文

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第一章 绪论

测验：1.1 绪论

1、单选题：
‏数字图像最基本的单位  ​
选项：
A: 灰度
B: 打印点
C: 像素
D: 显示点
答案: 【 像素】点我阅读全文

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第1章Web技术介绍

第1章测验

1、单选题：
‍下面（      ）不是Web动态网页技术。‍
选项：
A: ASP.NET
B:  HTML
C:  JSP
D:  PHP
答案: 【  HTML】点我阅读全文

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基因工程

单元测试13

1、判断题：
‏重组DNA就是利用不同生物来源的DNA拼接的杂种DNA分子。‌
选项：
A: 正确
B: 错误
答案: 【 正确】点我阅读全文

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第一单元 市场营销观念

市场营销的概念随堂测验

1、单选题：
‌不属于以企业为中心的观念的是（  ）​
选项：
A: 生产观念
B: 产品观念
C: 推销观念
D: 市场营销观念
答案: 【 市场营销观念】点我阅读全文

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