题目

阅读理解 Forcenturies, people around the world have invented many sports. It's no surprisethat more and more unusual sports have appeared. HumanTowers Every twoyears, there is a strange but fun competition—Human Towers in Spain. The first prize goes to thehighest tower. In 2015, a group of players from China and Spain set a worldrecord: a nine-person-high human tower. In this exciting event, any visitor canhold out his arms with the local people and cheer together. CheeseRolling Championships (锦标赛) CheeseRolling Championships take place in May every year in Britain. It is atradi已知向量且则的值是___________.