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第一章 从文化产业到文化产业创意

单元测试1

1、单选题：
‎文化的本质是适应性，因此具有的         和特殊性的双重特征。‎
选项：
A: 普适性
B: 区域性
C: 时代性
D: 识别性
答案: 【 普适性】点我阅读全文

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第一章 植物的水分生理

植物的水分生理单元测验

1、单选题：
在烈日照射下，植物可通过蒸腾作用散失水分降低体温，是因为（   ）。‏‌‏
选项：
A: 水具有高比热
B: 水具有高气化热
C: 水具有表面张力
D: 水分子具有内聚力
答案: 【 水具有高气化热】点我阅读全文

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第一章 物流与物流学概述

测试

1、多选题：
‏下列物流活动中属于增值的物流活动的有（    ）。‌‏ ‌‏‌
选项：
A: 运输 
B: 仓储 
C:  物流系统规划
D: 代收货款 
答案: 【  物流系统规划;
代收货款 】点我阅读全文

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第一章 绪论

第一章 单元测验

1、单选题：
‎复杂体系样品剖析的全过程是‏
选项：
A: 分离→定性定量→结构鉴定
B: 分离→结构鉴定→复配→评价
C: 分离→纯化→定性定量
D: 分离→纯化→定性定量→结构鉴定→复配（合成）→评价
答案: 【 分离→纯化→定性定量→结构鉴定→复配（合成）→评价】点我阅读全文

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第一周总论

第一周测试题

1、单选题：
​什么标志着中国饮食文化的产生？​
选项：
A: 打猎
B: 使用工具
C: 农耕
D: 使用火
答案: 【 使用火】点我阅读全文

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第一章 绪论

绪论单元测验

1、单选题：
​不属于电力拖动自动控制系统构成单元的是（  ）。‏
选项：
A: 电动机
B: 功率放大与变换装置
C: 柴油机
D: 传感器
答案: 【 柴油机】点我阅读全文

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0 导论

导论测验

1、单选题：
马克思主义产生的阶级基础是（  ）​‍​
选项：
A: 资产阶级
B: 无产阶级
C: 农民阶级   
D: 手工业阶级
答案: 【 无产阶级】点我阅读全文

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第1周 第一章 绪论

第1周 第一章 绪论

1、单选题：
 监视设备的状态，判断其是否正常是（  ）‏A 设备故障诊断的任务    B 故障产生的原因‏C 设备状态监测的任务    D 消除故障的方法‏‍‏
选项：
A: 设备故障诊断的任务
B: 故障产生的原因
C: 设备状态监测的任务
D: 消除故障的方法
答案: 【 设备故障诊断的任务】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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实验一 植物标本的制作

植物标本的制作测验

1、单选题：
‎下列植物标本的采集中，哪种方法不够合理？​
选项：
A: 树木需要砍一个大的树枝
B: 树木只需要剪一段带花和/或带果的枝条
C: 小的草本植物采集带花和/或带果的全株
D: 寄生植物连同寄主一同采集
答案: 【 树木需要砍一个大的树枝】点我阅读全文

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