慕课标签存档

第1章 顺序结构程序设计

printf( )函数

1、填空题：
‎执行“printf("%d，%d",a, b); ”后在屏幕上将输出（      ）个整数。‌
答案: 【 2】点我阅读全文

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第一周

第一周测验

1、单选题：
​从学科领域角度，一个学化学专业的同学从事环境工程相关工作，是从转换到（   ） ‌
选项：
A: 从工程技术领域转换到自然科学领域
B: 从自然科学领域转换到社会科学领域
C: 从自然科学领域转换到工程技术领域
D: 从工程技术领域转换到社会科学领域
答案: 【 从自然科学领域转换到社会科学领域】点我阅读全文

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第一章 药物代谢动力学概述

药物代谢动力学概述测试

1、单选题：
‌有关药物代谢动力学描述正确的是‏
选项：
A: 定量研究药物在体内的吸收、分布、代谢和排泄规律的一门学科
B: 定量研究药物在体内代谢规律的一门学科
C: 定量研究药物对机体作用的一门学科
D: 定量研究药物与代谢酶相互作用的一门学科
答案: 【 定量研究药物在体内的吸收、分布、代谢和排泄规律的一门学科】点我阅读全文

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第三章 人类社会及其发展规律

第三章测验

1、单选题：
‎社会存在又称社会物质生活条件，下列不属于社会存在的选项是（）‏
选项：
A: 地理环境
B: 物质生产方式
C: 科学技术
D: 人口因素
答案: 【 科学技术】点我阅读全文

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第一周程序设计的基础知识

测验1：下列哪些能力是计算机擅长而人类不擅长的？

1、多选题：
下列哪些能力是计算机擅长而人类不擅长的？
选项：
A: 推理
B: 计算
C: 记忆
D: 抽象
答案: 【 计算;
记忆】点我阅读全文

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第1周——从键盘中来，到键盘中去，开始输入和输出啦

%c格式转换说明

1、判断题：
‌用c格式符输入字符型数据的时候，为了避免将输入缓冲区中的空白字符（空格、回车换行符、Tab键）作为有效字符读入，可以在%c前面加一个空格。‎
选项：
A: 正确
B: 错误
答案: 【 正确】点我阅读全文

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第一讲 改变世界的物理学

单元测验1——改变世界的物理学

1、单选题：
‌‏‌下列有关物理学史的说法正确的是:‏
选项：
A: 卡文迪许发现了万有引力定律
B: 法拉第发现了电流的磁效应
C: 麦克斯韦首先预言了电磁波的存在
D: 汤姆生提出了原子的核式结构模型
答案: 【 麦克斯韦首先预言了电磁波的存在】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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模块一 认识管理与管理者

随堂测验

1、单选题：
‌3、“人贵在于自知之明”，属于情商中的（    ）‍
选项：
A: 了解自己情绪的能力
B: 控制自己情绪的能力
C: 自我激励能力
D: 了解他人情绪的能力
答案: 【 了解自己情绪的能力】点我阅读全文

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01 制图规格及基本技能

01 单元测试

1、单选题：
‎在土木工程制图中，断开界线可采用（   ）‌
选项：
A: 波浪线
B: 细实线
C: 细虚线
D: 粗单点长画线
答案: 【 波浪线】点我阅读全文

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