【判断题】基准轴是在基轴制配合中选作基准的轴,用“h”表示。
【简答题】阅读理解。 The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class. In the last 15 years, pilots have reported well over ...
【判断题】( )基准轴是在基轴制配合中选作基准的轴,用“h"表示。A. 对 B. 错
【简答题】The biggest safety threat(威胁)facing airlines today may not be a man with a gun ,but the man with portable(便携式)computer in business class .In the past 15 years ,pilots have reported about over 100 inci...