You have been working in a company White & Associates for five years. But now you decide to quit because you are moving to another city with your parents. Write a letter to your boss, Mr. Brown, telling him your decision, stating your reason(s), and making an apology.
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You were unable to attend Mr. Wongs examination on Academic Writing because you got sick that morning. Write a letter to express the reasons for not being able to attend it, apologize and suggest a solution.
下面对商鞅变法论述不正确的是()。
A. 是一次新兴地主阶级建立地主阶级专政的改革
B. 是一次废除土地私有制的革新
C. 是一次土地私有制代替奴隶制的土地国有制的改革
D. 是一次废除奴隶主贵族特权的革新
ISO的OSI安全体系结构中,以下哪一个安全机制可以提供抗抵赖安全服务()
A. 加密
B. 数字签名
C. 访问控制
D. 路由控制
以下关于事故的征兆和预兆说法不正确的是:()
A. 预兆是事故可能在将来出现的标志
B. 征兆是事故可能己经发生或正在发生的标志
C. 预兆和征兆的来源包括网络和主机IDS 、防病毒软件、系统和网络日志
D. 所有事故的预兆和征兆都是可以发现的