1、【第45题-单选】2018年7月12日,习近平总书记对中央和国家机关推进党的政治建设作出重要指示强调,中央和国家机关首先是( ),带头维护党中央权威和集中统一领导,建设让党中央放心、让人民满意的模范机关。

1、【第587题-判断】下列表述是否正确:Security fibres can be used to identify counterfeit documents. ()

1、【第586题-判断】下列表述是否正确:Industrial printing techniques include laser engraving, laser printing and laser perforation. ()

1、【第585题-判断】下列表述是否正确:Laser printing is a personal information integration technique. ()

1、【第584题-判断】下列表述是否正确:Laser perforation is an issuing technique. ()

1、【第583题-判断】下列表述是否正确:Letterpress is one of the desktop printing processes. ()

1、【第582题-判断】下列表述是否正确:Metameric ink can be observed as the same colour under reflected light. ()

1、【第581题-判断】下列表述是否正确:Shadow watermark can be slightly observed under side light. ()

1、【第580题-判断】下列表述是否正确:Line watermark can be slightly observed under side light. ()

1、【第579题-判断】下列表述是否正确:Intaglio printing has the printing character of halo and squash. ()

1、【第578题-判断】下列表述是否正确:Laser printing can have tactile effects. ()