题目

如图，在等腰梯形ABCD中，AD∥BC，，若，，则梯形ABCD的周长为_______  答案：30解析:略 We were on tour a few summers ago, driving through Chicago, when right outside of the city, we got pulled over(被迫停车). A middle-aged policeman came up to the ear and was really being troublesome at first. He said, "You were speeding. Where are you going in such a hurry?" Our guitarist, Tim, told him that we were on our way to Wisconsin to play a show. Then his way towards us totally changed. He asked, "Oh, so you boys are in a band?" We told him that we were. He then asked all the usual band questions about the type of music we played, and how long we had been at it. Suddenly, he stopped and said, "Tim, you want to get out of this ticket, don't you?" Tim said, "Yes. " So the officer asked him to step out of the car. The rest of us, inside the car, didn' t know what to think as we watched the policeman talk to Tim. Then the policeman put Tim in the back of the police car and threw the car into reverse(倒车), stopping a few feet in back of our car. Now we suddenly felt frightened. We didn't know if we were all going to prison. Suddenly, the policeman's voice came over in a loudspeaker. He said, "Ladies and gentlemen, for the first time ever, we have Tim here singing on Route 90." Later we knew, the policeman had told Tim that if he sang one of our songs over the loudspeaker in the police car, we would get out of the ticket. Seconds later, Tim started screaming into the receiver. The policeman enjoyed the performance, and sent us on our way without a ticket.小题1:Why did the policeman stop the boys?A．Because they drove too fast.B．Because they were late for their show.C．Because they didn't see the policeman.D．Because they had to answer the band questions.小题2:The policeman became friendly to the boys when he knew they ______.A．had long been at the bandB．played the music he lovedC．were driving for a showD．promised him a performance小题3:The underlined word "ticket" in paragraph 2 means "a piece of paper that ______".A．allows you to enter a cinemaB．shows the price or size in a shopC．shows that you have paid to travel on a busD．orders you to pay money because you have done something wrong小题4:How did the boys probably feel when they went on their way again?A．Happy.B．Calm.C．Angry.D．Frightened.