题目内容
沟通过程中人们经常采用面谈的方式，面谈不足之处在于
查看答案
搜索结果不匹配？点我反馈
更多问题
生产部门认为产品设计方案难以实施，向设计部门提出改进建议，这种情况属于横向沟通。
主要有5种约束，分别是主键约束、唯一约束、外键约束、检查点约束、非空约束。
下列属于数据库对象的是（）
2018 年 年 12 月大学英语四级考试真题（ 二 ）Listening Comprehension (25 minutes)Section ADirections: In this section, you will hear three news reports. At the end of each news report, you will hear two or three questions. Both the news report and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.Questions 1 and 2 are based on the news report you have just heard.[音频]
微信支付 
支付宝支付