题目

奥运会吉祥物“福娃”活泼可爱，如图17是“福娃”在几个比赛项目中的运动形象，请从物理学角度分析，将下表空格处（①、②、③、④）补充完整.比赛项目提出的物理问题运用物理知识解答1羽毛球被击出后的羽毛球为什么还能在空中继续飞行？①2篮球扣篮时，篮球脱手后还能在空中下降中，“福娃”对篮球为什么不做功？②3皮划艇用桨向后划水，为什么皮划艇会前进？③4足球斜向上踢出的足球，为什么最终回到地面上？④ 根据对话内容，从方框内选择恰当的句子填人对话相应的空白处，使对话完整，合乎情景．（有两个多余选项）。A．That’s an interesting idea．B．We can’t wait to see the toys you’ve done．C．Some bottles dropped onto the floor．D．Can you show some to us one day?E．Can you help us make some toys?F．Have you already made some toys?G．Why do you collect bottles?（Miss Yu is giving a class．Suddenly some bottles drop out of a student’s desk．）T：What the noise there?S：Sorry，Miss Yu．【1】________T：（Walking over to take fl look）Oh，so many bottles!S：I’m collecting bottles．T：【2】________S：Because I want to make toys of them．Y：【3】________ If so why not put a big paper box at the back of our classroom? Then your classmates can help collect the bottles．S：Thanks for your advice．T：【4】________S：Yes，quite a few．T：【5】________S：Of course．I’II bring a few here tomorrow．T：Perfect!