题目

两块小石头做竖直上抛运动，初速度大小之比为3：4，则它们上升的最大高度和到达最高点所用的时间之比分别为（） A . ：23：4 B . 9：16 ：2 C . 3：49：16 D . 9：163：4 答案：D　 Zhang Lili, a Chinese language teacher at No, 19 Middle School of Jiamusi in Northeast China's Heilongjiang Province, has recently been considered the Most Beautiful Teacher in China.　 At 8:38 pm on Tuesday, May 8th. 2012, Zhang Lili and her several students were crossing a road when suddenly an out-of-control school bus rushed towards them. Without any hesitation (犹豫), she pushed two students out of the way, but she was then run over and her own legs were found under the wheels. The 29-year-old teacher lost her legs.　 Jin Yanping, vice head teacher of No. 19 Middle School, Jiamusi City, said, "She is a backbone teacher in our school. She's also the most popular teacher among the students. For the students, she is a sister. They call her Beautiful Sister."　 But Zhang Lili is more than a teacher and sister to the 53 students ha her class. She cares about their studies and even their lives.　 A student's parent said, "She is very warm-hearted. My son has lost his father. Every month, the teacher gives him 100 yuan to buy books, with her own salary (工资)."　 But, for her family, anxiously waiting outside the ICU room, they just want her to live.　 Li Ziye, Zhang Lili's husband, said, "All our family want her to five, then we can conquer (克服) any difficulty, as long as our family is complete."　 Zhang Lili's deeds (事迹) drew wide attention from the country. She's been considered the Most Beautiful Teacher in China.54. Zhang Lili was hit and run over by a bus while she was　　　　　　 .　 A. taking a walk with her family on the road 　B. saving her students on the road　 C. caring about her students' studies　　　 　　D. giving the boy 100 yuan to buy books55. The underlined word "backbone" in this passage means　　　　 in Chinese.　 A. 分水岭　 　　　　 B. 中枢　 　　　　C. 骨干　　　　 D. 脊椎56. From this report we know　　　　　　　 . A. there was no driver in the bus　　　　　 B. Zhang Lili's family didn't know she was hurt C. Zhang Lili was pushed to the safe place by the students D. Zhang Lili is a brave, kind and excellent teacher