题目

（1）如图，画出磁极间磁感线方向。（2）如图，小明沿水平方向用200N的力推一辆车匀速向左运动。用力的示意图表示车受到的阻力。（3）如图9，用滑轮组提升物体，请画出最省力的绳子绕法。 答案：解析:Tony and Anna are brother and sister. They are Americans. Tony likes sports very much. He can play soccer, basketball and volleyball. Anna likes music(音乐) very much. She can't play ball games. But they both(两者都) like playing on computers. They like eggs, bread and milk for breakfast. For lunch, Anna likes eating vegetables and fruit, but Tony likes chicken and fish(鱼). They both like hamburgers. But they don' like ice cream or dessert. 根据短文内容，选择最佳答案。(10分) 1.Anna is Tony’s _____ and they are _____. A．sister; Chinese                         B．sister; Americans C．friend; Americans                       D．Friends; Chinese 2.Tony likes ______ and he can play ______. A．sports; tennis                          B．music; basketball C．sports; volleyball                        D．music; tennis 3.Tony and Anna both like _____. A．vegetables        B．soccer            C．playing on computers D．music 4.For breakfast, they like _____. A．eggs, bread and milk                     B．vegetables and fruit C．chicken and fish                        D．chicken and milk 5.They don’t like _____ or _____. A．ice cream; vegetables                    B．ice cream; dessert C．hamburgers; dessert                     D．Fish ; ice cream