【单选题】A person spins a tennis ball on a string in a horizontal circle (so that the axis of rotation is vertical). At the point indicated below, the ball is given a sharp blow in the forward direction. This ...
【单选题】Questions 2~6 are based on the following passage. Direction:In this part,you will have l5 minutes to go over the passage quickly and answer the questions on Answer Sheet l.For questions 2-8,choose the...