题目

有下列说法：①弦是直径 ②半圆是弧 ③圆中最长的弦是直径 ④半圆是圆中最长的弧 ⑤平分弦的直径垂直于弦，其中正确的个数有                           （     ）                                                                                                                                A．1个       B．2个        C．3个         D．4个Mr. Evans lived in a city. He was a bus driver in a company three years ago. He drove well and the people in the company all liked him. But a terrible accident changed（改变）his life. One spring he drove his bus with twenty- four workers to visit a place of interest. They had a good time there. But on their way back home, their bus was hit by a truck（卡车）because the truck driver was drunk（醉）. Four workers were killed and half of the rest of the workers got badly injured. Mr. Evans was also injured. After he came out of hospital, he left the company and became a traffic policeman. He tried his best to stop the drivers from breaking the traffic riles. He worked hard and was strict with the drivers, especially the drivers that were drunk. So they were afraid of him. But the people liked him, for he was a good policeman. 1.How did the accident happen?      A. The truck hit the bus.      B. The bus hit the truck.  C. The bus hit a big tree. 2.How many people were injured in the accident?      A. Four.                      B. Ten               C. Eleven. 3.What did Mr. Evans do after he left hospital?       A. He was a bus driver. B. He was a policeman. C. He was a truck driver.