用以监控输气站环境里是否存在易燃气体的设备是().A.硫化氢分析仪 B.固定式易燃气 发布时间：2017-07-09 23:58 │ 来源：www.tikuol.com 题型：单项选择题 问题： 用以监控输气站环境里是否存在易燃气体的设备是().A.硫化氢分析仪B.固定式易燃气体检测仪C.在线色谱分析仪D.电子点火装置
题型：单项选择题 某一核反应的模型中质量为m0、速度为v0的粒子与一个静止的质量为M的原子核碰撞后合为一体，又迅速发生变化而放出质量为m、速度为v的另一个粒子，此粒子的速度v与v0反方向，则余下的反冲核的反冲速度为多少？ 查看答案
题型：单项选择题 补全对话。从对话后的选项中选择适当的选项补全对话。 A. He grows oranges, peaches and grapes. B. And they are also sold in many cities in China. C. He has a farm in the countryside. D. You'll pick fruit! E. I'd like to go there on summer holidays. A: What's your plan for the summer holiday? B: I'll visit my cousin. 1. A: Is the farm big or small? B: It's not very big, but it's really a nice one. 2. A: I'm sure you will enjoy staying there. What does he grow on the farm? B: 3. A: What are you going to do there? B: I'll go there and help him pick fruit. A: 4. It sounds fun. B: It really does. And the fruits are very delicious. I enjoy them very much. A: Are they sold in Zigong? B: Of course. 5. My cousin will send them to other countries someday, too. 查看答案
题型：单项选择题 患者男，65岁。反复咳嗽，咳痰15年，活动后气短2年，双下肢水肿1个月。本次入院上述症状加重伴有呼吸困难3天。查体：桶状胸，三尖瓣区可闻及收缩期杂音。肺功能测定为阻塞性通气功能障碍。下列哪项表现符合此诊断（）A.残气量增加B.残气量下降C.肺活量下降D.残气量/肺总量下降E.第一秒用力呼气容积增加F.最大呼气中期流速显著下降G.肺总量下降 查看答案