题目

毛皮与橡胶棒摩擦时，毛皮因失去电子而带_____电荷，某粒子从带正电的原子核旁边高速穿越，其运行路线如图②，据此现象，可以猜想该粒子带负电，你猜想的依据是：_____。 答案：【答案】正 异种电荷相互吸引 【解析】摩擦起电实质是电荷的转移，得到电子带负电，失去电子带正电；同种电荷相互排斥；异种电荷相互吸引。毛皮跟橡胶棒摩擦过程中，毛皮摩擦过的橡胶棒带负电，毛皮因失去电子带正电；某粒子从带正电的原子核旁边高速穿越，其运行路线如图②，据此现象，Father’s Day is the third Sunday in June. It is a day to thank fathers. On that day, fathers usually receive greeting gifts and cards. On the cards, children will write, “Thanks, father.” “Best wishes for Father’s Day” and so on. Father’s Day is also a day families get together at home as well as in the restaurants.Where does the idea for the holiday come from? We should thank an American. In 1909 she wrote letters to some important persons. In her letter she advised to make Father’s Day on the third Sunday in June. In June in 1910, people celebrated the first Father’s Day in Washington. People whose parents are dead often decorated (装饰) their parents’ graves (坟墓) with flowers on these days. These are days of family fun and creating good feelings and memories.【小题1】When is Father’s Day?A．The second Sunday in May. B．The third Saturday in June. C．The third Sunday in June. D．The second Sunday in March. 【小题2】Where does the idea for the holiday come from?A．China. B．England. C．America. D．Italy. 【小题3】When did the people celebrate the first Father’s Day?A．In June in 1900. B．In June in 1909. C．In July in 1910. D．In June in 1910. 【小题4】Which sentence is NOT true?A．On the cards, children will write “Thanks father.” B．Father’s Day is also a day students get together at school. C．In 1909 an American wrote letters to some important persons. D．Father’s Day is a day families get together at home.