单项选择题
A．antirust；antiwear；antimagnetic B．antiwear；antimagnetic；antirust C．antimagnetic；antirust；antiwear D．antiwear；antirust；antimagnetic
A．Varna B．Phnom Penh C．Port Kelang D．Salonika
A．跟单汇票；跟单信用证；复本 B．跟单信用证；跟单汇票；复本 C．跟单信用证；复本；跟单汇票 D．复本；跟单汇票；跟单信用证