后备副本的主要用途是（）。
A.数据转储
B.历史档案
C.故障恢复
D.安全性控制
参考答案：C
If you had taken the doctor's advice a week earlier, you________quite well right now.[ ]
A. might have been
B. would have been
C. should have been
D. would be
有一辆7座家庭用车上一年度发生两次有责任不涉及死亡的道路交通事故，今年交强险的保费应为：（）
A.950元
B.1045
C.1210
D.1100
