题目

下列事件中，是随机事件的是（ ）．A.相似三角形的对应角相等 B.的半径为5，，点在外C.买一张电影票，座位号是奇数 D.直径所对的圆周角为直角 答案：【答案】C【解析】根据必然事件和随机事件概念判定即可，必然事件：在一定条件下一定发生的事件；不确定事件即随机事件：在一定条件下，可能发生也可能不发生的事件．A、 是必然事件，故不符题意；B、是不可能事件，故不符题意；C、 是随机事件，故符合题意；D、 是必然事件，故不符题意；Johnny lived with his mother and father in a small town in the mountains.One day there was an earthquake near the town. Many houses were destroyed. Everyone thought that there would soon be another earthquake.They were worried that the second earthquake would be worse than the first.“We must send Johnny to a safe place.” Johnny’s mother said to her husband, “ Many of our friends are sending their children to relatives(亲戚)in other towns.”“We’ll send him to my brother, Peter,” Johnny’s father said, “He lives a long way away.” Johnny will be safe with him.He telephoned Johnny’s uncle Peter and asked him if he would let Johnny live with him.“He’s a good boy,” he said, “won’t put you in hot water.”“All right,” Johnny’s Uncle Peter said, “but I’m not used to children. I live a very quiet and peaceful life.”“You won’t know Johnny’s in the house,” his father told him.So Johnny, who was five, went to live with his uncle.Two days later, his mother and father received a telegram(电报) from Peter saying “___________. ” After Johnny’s parents knew it, they felt sorry for it.【1】The underlined word “Put you in hot water” in the passage most probably means _______.A. give you any troubleB. keep you in dangerC. boil some hot water for you.【2】Johnny and his parents lived ________.A. in a big townB. near the seaC. in the mountains【3】Uncle Peter worried about Johnny coming to live with him because ________.A.he ws not used to childrenB.he was an old manC.his house was far from Johnny’s.【4】Which of the following is TRUE?A.Johnny’s parents sent him away because his uncle wanted to see him.B.Johnny’s parents received a telephone after Johnny was sent to his uncle’s home two days later.C.Uncle Peter didn’t like noisy life.【5】 “__________” can be the missing sentence in the passage.A. I enjoy the days with Johnny because we have no arguments with each other.B. I’m returning the child. Please send an earthquake.C. Your lovely son likes living with me very much.