只备份上次完全备份后产生和更新过的数据，属于______。
A．完全备份
B．增量备份
C．差异备份
D．冷备份
参考答案：C
个体工商户凭营业执照以字号或经营者姓名开立的银行结算账户纳入个人银行结算账户管理。( )
Which of the following is true according to the speaker().
A. There are some questions if we start over.
B. We should do it again.
C. It’s impossible to do it again.
D. We should start over.
