【简答题】按注塑模具浇注系统基本结构的不同可分为____、____和____。
【判断题】Exhibitors usually sell more products at trade fairs than sales calls.
【单选题】Usually, trade fairs can only be attended by _____ and members of the press.
A.
company representatives
【判断题】Exhibitors usually sell more products at trade fairs than sales calls.
【单选题】Usually, trade fairs can only be attended by _____ and members of the press.
A.
company representatives
【判断题】糟溜鱼片操作过程中,鱼片需要滑油,油温控制在 5 成。( )
【多选题】中国第一颗原子弹的总设计师是(),第一颗氢弹的总设计师是()。