智慧树慕课答案
1、单选题：
下列属于经济学家对职业定义的是（ ）。
选项：
A: 职业是一套成为模式的与特殊工作经验有关的人权关系
B: 职业是从事相对稳定的、有收入的、专门类别的工作
C: 职业是社会地位、人际关系、权力与国家授予的结合
D: 职业是不断取得个人收入而从事的具有市场价值的特殊活动，这种活动决定着从业者的社会地位
答案: 【 职业是从事相对稳定的、有收入的、专门类别的工作】点我阅读全文
1、单选题：
人文地理研究课题的核心和关键是（ ）
选项：
A: 确定研究课题
B: 制定研究计划
C: 调查研究
D: 分析研究
答案: 【 分析研究】点我阅读全文
1、多选题：
在市场营销学中，行业和市场够成了肩带的市场营销系统。其中，以下哪一种或者多种流联接了买方和卖方（）
选项：
A: 产品流
B: 服务流
C: 信息流
D: 促销流
答案: 【 产品流;
服务流;
信息流;
促销流】点我阅读全文
1、单选题：
宏观经济学的中心理论是（ ）
选项：
A: 价格决定理论
B: 工资决定理论
C: 国民收入决定理论
D: 汇率决定理论
答案: 【 国民收入决定理论】点我阅读全文
1、单选题：
下列各种情形中，会产生可抵扣暂时性差异的有（ ）
选项：
A: A. 负债的账面价值大于其计税基础
B: B.资产的账面价值大于其计税基础
C: C. 资产的账面价值等于其计税基础
D: D.负债的账面价值小于其计税基础
答案: 【 A. 负债的账面价值大于其计税基础】点我阅读全文
1、单选题：
下面不属于学习广告心理学的原则的是( )
选项：
A: 系统性原则
B: 特定性原则
C: 教育性原则
D: 娱乐性原则
答案: 【 娱乐性原则】点我阅读全文
1、单选题：
现金流的要素不包含以下哪个方面？
选项：
A: 大小
B: 方向
C: 作用点
D: 计算期
答案: 【 计算期】点我阅读全文
1、判断题：
The play will soon over.
选项：
A: 正确
B: 错误
答案: 【 错误】点我阅读全文
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、单选题：
（ ）已成为纺织工业中发展最快的一个行业。
选项：
A: 非织造材料与工程
B: 服装工程
C: 染整技术
D: 轻工技术
答案: 【 非织造材料与工程】点我阅读全文