【单选题】以下列出了计算机信息系统抽象结构层次,其中的数据库管理系统和数据库()。
【判断题】9判断题1汇率风险也称为外汇风险。( )。
【单选题】采集数据时,根据不同的数据来源我们可以采取不同的采集方法,下列属于有效的数据采集方法的有( )。①复制数据文件 ②从信息系统导出数据 ③爬取网络数据 ④从微信企业号接口接收数据 ⑤数据采集器接收温度传感器数据
【单选题】As a medium of exchange, money permits the separation of exchange into the two distinct acts of buying and selling, without requiring the seller to purchase goods from the person who buys his products...
A.
you have to sell something in order to buy something
B.
you have to buy something in order to sell something
C.
you don't have to buy something in order to sell something
D.
the seller and the purchaser are the same person
【单选题】听力原文: (32)Your assignments this term will be to write two major research papers.One of the most important things about writing a research paper is giving proper credit of your resources of information...
A.
Reading magazine articles.
B.
Reviewing book reports.
C.
Writing research papers.
D.
Selecting information sources.
【判断题】传统的数据采集不仅能够按照某种匹配模式抓取数据,同时能够实时监控数据质量。