mooc答案类别订阅

集合论和数理逻辑单元测验

1、单选题：
‌下列句子为真命题的是(     )。​
选项：
A: 雪是黑色的，当且仅当5<0
B: 自然数中存在最大素数
C: 今天天气真好呀
D: 只有5<0,雪才是白色的
答案: 【 雪是黑色的，当且仅当5<0】点我阅读全文

测验

1、单选题：
‎曲柄压力机直接与模具相连接的部分        。‏
选项：
A: 曲柄
B: 滑块
C: 工作台
D: 离合器
答案: 【 滑块】点我阅读全文

第一章 绪论 单元测验

1、单选题：
‌（）是预防事故的基本措施。‎
选项：
A: 安全理论
B: 安全方法
C: 安全管理
D: 安全技术
答案: 【 安全技术】点我阅读全文

第二和第三章的单元测验

1、单选题：
​单元的应变是‍
选项：
A: 由节点应变插值而得
B: 由位移场用几何方程求得
C: 用物理方程求得
D: 认为整个单元相同
答案: 【 由位移场用几何方程求得】点我阅读全文

AcademicWriting&CriticalThinking

1、单选题：
Read the following passage about Zoos and answer the questions.‌‌Zoos have existed in some form since at least 2500 BC in Egypt and Mesopotamia, where records indicate giraffes, bears, dolphins, and other animals were kept by aristocrats. The oldest still operating zoo in the world, Tiergarten Schönbrunn in Vienna, opened in 1752. Although controversy has historically surrounded zoos, from debates over displaying "exotic" humans in exhibits to zookeepers not knowing what to feed animals, I do believe that zoos should exist. ①In my opinion, zoos are important institutions that promote scientific research and public education, and save animals from extinction.‌First of all, zoos produce helpful scientific research. Since so many diseases can be transmitted from animals to humans, such as Ebola and the bird flu, zoos frequently conduct disease surveillance research in wildlife populations and their own captive populations that can lead to a direct impact on human health. Take the zoos in the United Stated as an example. In 2017, 173 accredited US zoos spent $25 million on research, studied 485 species and subspecies of animals, worked on 1,280 research projects, and published 170 research manuscripts.‌②Zoos can also educate the public about animals and conservation efforts. According to a study of 26 zoos worldwide published in Conservation Biology, visitors to zoos increased their knowledge of biodiversity and specific individual actions to protect biodiversity. Robin Ganzert, PhD, President and CEO of American Humane, once stated, "Zoos provide people, especially impressionable children, with the opportunity to see these remarkable animals up close. People won't protect what they don't love, and they can't love what they don't know.” ③It is zoos that give people the chance to appreciate the animals from different corners of the world in real life.‌In addition, zoos help save species from extinction and other dangers. According to records, there were only nine California condors in the wild in 1985. ④However, a joint conservation effort between the San Diego and Los Angeles Zoos with other organizations resulted in a population of 276 California condors in the wild and another 170 in captivity by 2016. The truth is that zoos are working to save polar bears, tigers, and wild African elephants from habitat loss, apes and rhinos from poachers, dolphins and whales from hunters, and bees and butterflies from population declines, among many other efforts to help many other animals.‌In conclusion, zoos do bring a lot of benefits to mankind and thus have a reason to exist. No matter in the promotion of scientific research and public education or in the save of animals from extinction, they have indeed made a huge difference.‌ ‌1. What is the main argument of the author?‌
选项：
A: Zoos should exist.
B: Zoos help save species from extinction and other dangers.
C: Zoos can promote scientific research and public education, and save animals from extinction.
D: Zoos should exist because they can help promote scientific research and public education, and save animals from extinction.
答案: 【 Zoos should exist because they can help promote scientific research and public education, and save animals from extinction.】点我阅读全文

第一章章节测试

1、单选题：
‍当价格变动百分比大于需求变动百分比时‌‍‌
选项：
A: 需求富有弹性
B: 价格上升会增加总收益
C: 需求完全无弹性
D: 价格下降会增加总收益
答案: 【 价格上升会增加总收益】点我阅读全文

随堂测验

1、多选题：
​音域是指歌唱者所能唱出的高低范围，可以根据歌唱者训练前的（）与训练后的（）来进行声部的判断。‌
选项：
A: 自然音域
B: 最大音域
C: 最小音域
D: 歌唱音域
答案: 【 自然音域;
歌唱音域】点我阅读全文

单元测验11

1、单选题：
​According to Professor Kachru’s “Three Concentric Circles” model, which circle does Japanese English belong to?​
选项：
A: Inner Circle
B: Outer Circle
C: Expanding Circle
D: None of the Circles
答案: 【 Expanding Circle】点我阅读全文

期末考核（公选1）

期末考核（公选2）

第一章 原核微生物单元测验题

1、单选题：
‎革兰氏染色的关键步骤是       。‎
选项：
A: 结晶紫初染
B: 碘液媒染
C: 酒精脱色
D: 番红复染
答案: 【 酒精脱色】点我阅读全文