各国在国际私法实践中，为了维护本国利益和克服适用外国法过程中发生的困难而形成的适用外

The manager was worried about the press conference his assistant ______ in his place but luckily, everything was going on smoothly.

A．gave

B．gives

C．was giving

D．had given

The number 13 is a special number, ____, I think, that will be hated by the foreigners.

A．what

B．it

C．which

D．one

评定跳汰机分选效果的指标有（）

A、可能偏差

B、不完善度

C、数量效率

D、错配物

E、污染指标

F、分配密度

《公安机关人民警察奖励条令》规定，授予个人荣誉称号是指授予一级英雄模范，二级英雄模范，三级英雄模范称号。( )

直颈六棱瓶