题目内容
49.Which of the following can be placed in the human body to store important information about a person, such as medical history, and can be GPS-enabled to offer a method of tracking?
查看答案
搜索结果不匹配？点我反馈
更多问题
50.Which of the following is a standard for transmitting information in the form of short-range radio waves over distances of up to 30 feet?
53.Which of the following refers to a wireless transmission technology developed primarily for mobile phones to support mobile commerce and other phone activities?
数据模型是数据库中数据的存储方式，是数据库系统的基础。在几十年的数据库发展史中，出现了许多重要的数据库模型。目前，应用最广泛的是（）模型
在下面关于数据库的说法中，错误的是（）
微信支付 
支付宝支付