当固定电话用户申请了呼叫转移服务时，对该用户将不会出现以下哪一种情况（）
A.呼叫等待
B.呼叫限制
C.热线服务
D.来电显示
参考答案：A
The millions of calculations involved, had they been done by hand, () all practical value by the time they were finished.
A. could lose
B. would have lost
C. might lose
D. ought to have lost
从对过去的事故分析可以得出这样的结论：企业的违章行为和由此而诱发的事故中，有（）%以上发生在基层班组。
A、70
B、80
C、90
D、100
