食管癌好发于 A．颈段食管 B．上段食管 C．中段食管 D．下段食管 E．膈下食管 发布时间：2017-05-10 00:41 │ 来源：www.tikuol.com 题型：单项选择题 问题： 食管癌好发于A．颈段食管B．上段食管C．中段食管D．下段食管E．膈下食管
题型：单项选择题 短文改错。Dear Carmen, It is early afternoon and I am sitting in the small restaurant closed to my work. It is a terrible day in New Orleans. It is raining and I am feeling homesick. I am thinking you and my other friends in Mexico. Outside, a sidewalksis crowded with people. All of them are wearing coats and carry umbrellas. Everyone is in a hurry to get a dry place. Bus and cars are moving up and down the streets. Inside,it is warm and pleasant. I attend classes in every morning. I don't have many free time. But I like my life here. I hope that you are good and happy. Please write soon. I enjoy yourletters with news from home. 1______________2______________3______________4______________5______________ 6______________7______________8______________9______________10______________ 查看答案
题型：单项选择题 ( )是火灾自动报警与联动控制系统最基本和最关键的部件之一，它将火灾发生初期所产生的烟、光、热转变为电信号，输入火灾自动报警系统。A．火灾自动报警控制器B．消防设备联动控制器C．火灾探测器D．备用电源 查看答案