审查员根据其知识和工作经验,认为不可能找到密切相关的对比文件,或者认为预期的结果与需要花费的时间、精力和成本相比十分不相称,不值得继续检索,则可以中止检索。
参考答案:对
— May I speak to your manager Mr. Williams at five o'clock tonight?
— I'm sorry. Mr. Williams _____ to a conference long before then. [ ]
A. will have gone
B. had gone
C. would have gone
D. has gone
风险评价过程可分为哪四步?