题目

Li Yanhai,13, LiaoningI taught my mother the catchword ( 流 行 语 ) “Zhaxinle, Laotie ”. “Zhaxinle”means “You’ve broken my heart.” and “Laotie” means “homie”, which refers to a very close friend of yours. It’s a popular sentence from the northeast of China and now widely used by people around the country.Zhong Yunfei, 13, BeijingIt’s not easy to teach parents catchwords. Last month, I tried to teach them, “The baby suffers (忍受) inside, but he doesn’t say a word about it”. But they didn’t know why the word baby(‘baobao’ in Chinese)”was used here. T关于内能及其利用，下列说法正确的是（ ）A. 温度高的物体内能一定大B. 做功和热传递都可以改变物体的内能C. 比热容跟物体吸收或放出的热量有关D. 热机的做功冲程是将机械能转化为内能