【简答题】用方框中所给单词的适当形式填空,每词限用一次(每空一词)。 sheep, slow, listen, famous, first 1. The story Snow White is exciting and children enjoy _____ to it again and again. 2. The teacher speaks _____ to the older students s...
【单选题】You toss a 0.150-kg baseball straight upward so that it leaves your hand moving at 20.0 m/s. The ball reaches a maximum height y2. What is the speed of the ball when it is at a height of y2/2? Ignore ...