I栏 ( )1. How are you? ( )2. What day is it today? ( )3. This is Wei Hua. ( )4. Thank you very much. ( )5. Will you please come to my birthday party? ( )6. Are you free tomorrow? ( )7. What are you? ( )8. May I borrow your bike?
II栏 A. Nice to meet you. B. Yes, I think so. C. You're welcome. D. Yes, I'd love to. E. Yes, here you are. G. I am a worker. H. Friday.
从地面上一点竖直向上抛出，经过一段时间
后又以初速度
将球B从同一点竖直向上抛出（忽略空气阻力），为了使两球能在空中相遇， 
取值范围正确的是