【简答题】. The journey to the moon had been the first step toward future exploration(探险) in space. The distance between the Moon and Earth is very short indeed when compared with the distances between Earth an...
【简答题】A flock of hungry pigeons were flying across the sky in search of food. Having traveled a long distance, they felt tired and settled down on a tree. Just below the tree, they saw grains strewn (撒满) a...