mooc答案类别

第1讲 函数程序设计简介

单元测验：Haskell解释器

1、单选题：
‏Haskell脚本扩展名为 ​
选项：
A: .txt
B: .doc
C: .java
D: .hs
答案: 【 .hs】点我阅读全文

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第一章 金融工程的内涵及发展

第1章 金融工程的内涵及发展单元测验

1、单选题：
‌在公元1600年左右的日本，富裕的地主们就设计了一种叫做“大米库存票据”的产品，以控制由于天气变化而导致的大米价格涨跌的风险。该种“大米库存票据”被认为蕴含了金融工程的思想，其本质上是()‏
选项：
A: 期货合约
B: 期权
C: 互换合约
D: 商业汇票
答案: 【 期货合约】点我阅读全文

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第一章 会计本质一个信息系统

会计主要提供哪些信息？

1、单选题：
​资产负债表编制的逻辑依据是（  ）。‎
选项：
A: 账户结构原理
B: 复式记账原理
C: 会计恒等式
D: 动态会计等式
答案: 【 会计恒等式】点我阅读全文

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第一周初识动画与基本工具的使用

第一周单元测试

1、单选题：
​Ａlpha是啥意思？​
选项：
A: 透明度或不透明度
B: 浓度
C: 厚度
D: 深度
答案: 【 透明度或不透明度】点我阅读全文

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Unit10

test10

1、单选题：
Read a text about 'Wind Power in the US' and answer some questions.‌ ‌Wind Power in the US‌Prompted by the oil crises of the 1970s, a wind-power industry flourished briefly in the United States. But then world oil prices dropped, and funding for research into renewable energy was cut. By the mid 1980s US interest in wind energy as a large-scale source of energy had almost disappeared. The development of wind power at this time suffered not only from badly designed equipment, but also from poor long-term planning, economic projections that were too optimistic and the difficulty of finding suitable locations for the wind turbines.‌Only now are technological advances beginning to offer hope that wind power will come to be accepted as a reliable and important source of electricity. There have been significant successes in California, in particular, where wind farms now have a capacity of 1500 megawatts, comparable to a large nuclear or fossil-fuelled power station, and produce 1.5 per cent of the state’s electricity.‌Nevertheless, in the US, the image of wind power is still distorted by early failures. One of the most persistent criticisms is that wind power is not a significant energy resource. Researchers at the Battelle Northwest Laboratory, however, estimate that today wind turbine technology could supply 20 per cent of the electrical power the country needs. As a local resource, wind power has even greater potential. Minnesota’s energy commission calculates that a wind farm on one of the state’s south western ridges could supply almost all that state’s electricity. North Dakota alone has enough sites suitable for wind farms to supply more than a third of all electricity consumed in the continental US.‌The prevailing notion that wind power is too costly results largely from early research which focused on turbines with huge blades that stood hundreds of metres tall. These machines were not designed for ease of production or maintenance, and they were enormously expensive. Because the major factors influencing the overall cost of wind power are the cost of the turbine and its supporting systems, including land, as well as operating and maintenance costs, it is hardly surprising that it was thought at the time that wind energy could not be supplied at a commercially competitive price. More recent developments such as those seen on California wind farms have dramatically changed the economic picture for wind energy. These systems, like installations in Hawaii and several European countries, have benefited from the economies of scale that come through standardised manufacturing and purchasing. The result has been a dramatic drop in capital costs: the installed cost of new wind turbines stood at $1000 per kilowatt in 1993, down from about $4000 per kilowatt in 1980, and continues to fall. Design improvements and more efficient maintenance programs for large numbers of turbines have reduced operating costs as well. The cost of electricity delivered by wind farm turbines has decreased from about 30 cents per kilowatt-hour to between 7 and 9 cents, which is generally less than the cost of electricity from conventional power stations. Reliability has also improved dramatically. The latest turbines run more than 95 per cent of the time, compared with around 60 per cent in the early 1980s. Another misconception is that improved designs are needed to make wind power feasible. Out of the numerous wind turbine designs proposed or built by inventors or developers, the propeller-blade type, which is based on detailed analytical models as well as extensive experimental data, has emerged as predominant among the more than 20,000 machines now in commercial operation world-wide. Like the gas-driven turbines that power jet aircraft, these are sophisticated pieces of rotating machinery. They are already highly efficient, and there is no reason to believe that other configurations will produce major benefits. Like other ways of generating electricity, wind power does not leave the environment entirely unharmed. There are many potential problems, ranging from interference with telecommunications to impact on wildlife and natural habitats. But these effects must be balanced against those associated with other forms of electricity generation. Conventional power stations impose hidden costs on society, such as the control of air pollution, the management of nuclear waste and global warming. As wind power has been ignored in the US over the past few years, expertise and commercial exploitation in the field have shifted to Europe. The European Union spends 10 times as much as the US government on research and development of wind energy. It estimates that at least 10 per cent of Europe’s electrical power could be supplied by land-based wind-turbines using current technology. Indeed, according to the American Wind Energy Association, an independent organisation based in Washington, Denmark, Britain, Spain and the Netherlands will each surpass the US in the generating capacity of wind turbines installed during the rest of the decade.‌1  Which one of the statements is true?‌‍‌
选项：
A:   Cost was a big factor in preventing the development of wind power
B: Wind power can provide enough electricty for the United States
C:  Some US states are powered solely by wind
D:  Wind power has developed steadily since the 1970s.
答案: 【   Cost was a big factor in preventing the development of wind power】点我阅读全文

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第一、二周 会计总论

第一周 单元测验

1、单选题：
‍会计对象的表述中，不正确的是（    ）。‏
选项：
A: 会计对象指会计核算和监督的内容
B: 会计对象是指某一法律主体发生的所有经济业务
C: 会计对象在企业中具体表现为再生产过程中的资金运动
D: 凡是特定主体能够以货币表现的经济活动就是会计的对象
答案: 【 会计对象是指某一法律主体发生的所有经济业务】点我阅读全文

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第一章——基底化妆

2章3节测试题

1、单选题：
​立体矫型打底的主要目的：（  ）‌​‌
选项：
A: 使妆面更上妆  
B: 突出立体感
C: 更好的遮瑕
D: 突出优点
答案: 【 突出立体感】点我阅读全文

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第17章 光的干涉

光的干涉 单元测验

1、单选题：
​真空中波长为λ的单色光，在折射率为n的均匀透明媒质中，从A点沿某一路径传播到B点，路径的长度为l．A、B两点光振动相位差记为Δφ. 则‏​‏
选项：
A: l＝3 λ/ 2，Δφ＝3π．
B: l＝3λ/ (2n)，Δφ＝3 nπ
C: l＝3 λ / (2n)，Δφ＝3π．
D: l＝3nλ/ 2，Δφ＝3 nπ．
答案: 【 l＝3 λ / (2n)，Δφ＝3π．】点我阅读全文

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Unit Eight Teaching Grammar

单元作业1

1、判断题：
‏Grammar teaching “can enhance learner proficiency and accuracy and facilitate the internalization of its syntactic system. ‎
选项：
A: 正确
B: 错误
答案: 【 正确】点我阅读全文

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第一篇国际金融基础篇

1.1开放经济下的国民收入核算随堂测验

1、单选题：
​从国内经济核算角度看，一国经济核算不包括下列哪个方面？‎
选项：
A: 国内生产总值
B: 投入产出
C: 国际收支
D: 货币供应量
答案: 【 货币供应量】点我阅读全文

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