《入境货物报检单》的“随附单据”栏应由报检员根据提供的单据种类填写。 ( )
参考答案：对
London,______ last year, is a nice old city.
A．that I visited
B．which I visited
C．I visited
D．where I visited
试述紧急制动阀的构造与作用？
