本答案对应课程为:点我自动跳转查看
本课程起止时间为:2020-02-17到2020-04-10
本篇答案更新状态:已完结
1、 问题:时间序列和随机过程的定义及随机过程与时间序列之间的区别联系。
评分规则: 【 该题主要考察对时间序列的理解，结合随机过程，进一步理解时间序列研究领域及范畴。请以以下两条作为基本评分点：1.分别说明随机过程的定义和时间序列的定义。
2.能说明两者间的区别联系，一目了然，并能让评阅者看懂并赞同其表达的含义，具体得分要求： 论证详细，逻辑清晰 6分论证简单，没有重大逻辑错误 4分论证粗糙，逻辑比较混乱 1分
】 点我阅读全文
本答案对应课程为:点我自动跳转查看
本课程起止时间为:2020-02-29到2020-06-30
本篇答案更新状态:已完结
1、 问题:Go through the passage “Body Language” within 1 minute, and answer the question that follows. (Tips: Read the first sentence of each paragraph.)Body Language What does scientific literature tell us about the idea that body language reflects our real feelings? One experiment carried out about 10 years ago by Ross Buck from Carnegie-Mellon University in Pennsylvania suggests that spontaneous facial expression is not a very good index of real emotional state. Buck and his colleagues tested the accuracy with which people could identify the emotions felt by another person. They presented one set of subjects with color slides involving a variety of emotionally-loaded visual stimuli – such as “scenic” slides (landscapes, etc), “maternal” slides (mothers and young children), disgusting slides (severe facial injuries and burns) and unusual slides (art objects). 点我阅读全文
本答案对应课程为:点我自动跳转查看
本课程起止时间为:2020-02-10到2020-06-08
本篇答案更新状态:已完结
1、 问题:What did Leeuwenhoek do?
选项：
A: Looked at cork
B:Stated that plants are made of cells
C: Stated that animals are made of cells
D:Used simple light microscope and saw microorganisms
答案: 【Used simple light microscope and saw microorganisms】 点我阅读全文
为5m/s，则当ｔ为3s时，质点的速率 
为多大?