① Can I help you? ____     A. He is ill.

② What can Sarah do?  ____     B. I went there by plane.

③ What's the matter with Sam?  ____     C. She can play the piano.

④ How did you go to Beijing last winter holiday? ____     D. Red.

⑤ What's your favourite colour?____     E. Yes, I'd like a shirt.

将下列内容的号码和各国首都填在表中相应位置：

①地跨两个大洲和东西半球、地势东高西低、平原广大、温带大陆性气候为主 ②东亚岛国、多山的地形、湿润的气候、发达的经济、东西融合的文化 ③盛产葡萄酒、香水、时装、艺术表演享誉全世界、核电比重高 ④热带雨林和草原广布、最大的咖啡生产和出口国 ⑤地跨两大洲、沙漠广布、文明古国、盛产长绒棉⑥拥有一个大陆、地势低平、“骑在羊背上、坐在矿车上”的国家

用图1所示的装置探究摩擦力跟压力大小的关系．