【单选题】The invention of the computer is said to have ushered in another revolution__________ it has greatly changed people's way of living.
【单选题】风机型号Y4—73—11型中,Y表示()。
【判断题】天文定位其主要过程为包括计算天体的视位置,计算天体的计算高度和计算方位,计算天位船位线的两要素,计算天文船位( )。
【简答题】Besides attacking the ugliness of Westmoreland , what else does Mencken attack in this essay?
【单选题】在无线电波的几种传播方式中,()主要依靠地表进行传播。