题目

将一小球以初速度为V从地面竖直上抛后，经过4s小球离地面高度为6m，若要使小球竖直上抛后经2s到达相同高度，g取10m/s2，不计空气阻力，则初速度V0应： A．大于V    B．小于V    C．等于V     D．无法确定 答案：B阅读对话，并回答问题。 John: Hi, Sarah. What are you going to do? Sarah: I'm going to the cinema. How about you? John: I'm going to the bookstore. What film are you going to see? Sarah: Harry Porter. John: Really? It's a nice film, I hope you'll have a good time. Sarah: Thank you. How can you get to the bookshop? By taxi? John: No. I think it is too expensive. I'm going there by bike. Because it's good exercise. Sarah: OK, I have to go now. Goodbye. John: Bye. 1. Who is going to the cinema? ______________________________________________________2. What is John going to do? ______________________________________________________3. How is John going to the bookshop?______________________________________________________4. Are they going to the pet shop? ______________________________________________________5. What's the name of the film?______________________________________________________