慕课标签存档

第一周 第一章 绪论

第一周单元测验

1、单选题：
‌一般机器的主要组成部分应为‌
选项：
A: 驱动部分+传动部分+执行部分+ 控制部分
B: 驱动部分+执行部分
C: 驱动部分+传动部分+执行部分
D: 驱动部分+传动部分+执行部分+ 控制部分+智能部分
答案: 【 驱动部分+传动部分+执行部分+ 控制部分】点我阅读全文

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第1、2周课程专题一课程基本理念、核心概念和课程目标

专题一课程基本理念、核心概念和课程目标单元测试12

1、单选题：
‎教师由“教书匠”转变为“教育家”的主要条件为(    )。‏
选项：
A: 坚持学习课程理论与教学理论
B: 认真备课，认真上课
C: 撰写教育教学论文
D: 以研究者的眼光审视和分析教学理论和教学实践
答案: 【 以研究者的眼光审视和分析教学理论和教学实践】点我阅读全文

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第一章商务谈判的基础知识与原则

第一章习题

1、单选题：
‌所有谈判的共同谈判目标是‌
选项：
A: 要求谈清楚
B: 谈出结果
C: 划分责、权、利
D: 击败谈判对手
答案: 【 划分责、权、利】点我阅读全文

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单元1 数字化测图课程概述

练习1

1、单选题：
‍DRG是哪种数字图的缩写？‍
选项：
A: 数字栅格地图
B: 数字正射影像图
C: 数字高程模型
D: 数字线划地图
答案: 【 数字栅格地图】点我阅读全文

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第1章 规划管理基础

第1章单元测试

1、单选题：
‏以下选项不属于本节所述的四种国家起源模式的是‎
选项：
A: 融合论
B: 冲突论
C: 权利中心论
D: 资本论
答案: 【 资本论】点我阅读全文

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Week8UnitEightTimeoff

UnitTime

1、单选题：
‎The American psychologist says that ________.‏‎　‏
选项：
A: you can decide not to worry about something　
B: only people with a strong will can stop worrying
C:  to stop worrying you have to think of something else
D:  worrying is a useless emotion
答案: 【  to stop worrying you have to think of something else】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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项目一发电厂的经济性评价

测验发电厂的认知

1、单选题：
​在我国，火力发电厂的最常用的燃料是（     ）。‎
选项：
A: 煤
B: 石油
C: 天然气
D: 农林废弃物
答案: 【 煤】点我阅读全文

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第一章计算机技术与计算思维基础

第一章单元测验

1、单选题：
‍计算机的发展经历了四代，其阶段划分的依据是       。‌
选项：
A: 计算机的系统软件
B: 计算机的主要物理元器件
C: 计算机的处理速度
D: 计算机的应用领域
答案: 【 计算机的主要物理元器件】点我阅读全文

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第一章 绪论与气体

第一章单元测验

1、单选题：
‏对于实际气体，下列与理想气体相近的条件是：‍
选项：
A: 高温高压
B: 高温低压
C: 低温高压
D: 低温低压
答案: 【 高温低压】点我阅读全文

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