Despite setbacks and challenges, research and development personnel ______, and the company’s latest flagship chipset demonstrated their capability to innovate.
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An important legacy venue from the Beijing 2008 Summer Olympic Games, the tower's three-sided glass and steel design has been ______ as a local landmark.
Compared to the ______ phase of trade and economic cooperation, Sino-US trade volume increased by more than 250 times, surpassing the expected goal.
以下内容属于大学生应履行的维护国家安全的法律义务是( )。
A. 不得非法持有、使用专用间谍器材的义务
B. 在国家安全机关调查了解有关国家安全的情况下如实提供有关证据、情况的义务
C. 为国防建设和国家全工作提供便利条件或其他协助的义务
D. 依照法律服兵役和参加民兵组织的义务
活塞从上止点到下止点所让出的空间容积称为什么?
A. 发动机工作容积;
B. 气缸工作容积;
C. 燃烧室;
D. 总容积