主签约行是指在柜台前端系统为客户首次办理注册网银服务的营业网点，目前该机构一旦在系统中确认即不可更换。（）
参考答案：错
The little boy was so careless with his spelling that he often letters from words.
A．left off
B．left behind
C．left out
D．let alone
压力调压器首先应拆缷（）和装备组件。
