常用的配电电压有高压10KV和低压（）两种。A.3KV B.6KV C.10KV D 发布时间：2017-05-12 16:45 │ 来源：www.tikuol.com 题型：单项选择题 问题： 常用的配电电压有高压10KV和低压（）两种。A.3KVB.6KVC.10KVD.380/220V
题型：单项选择题 阅读理解。 Every 30 seconds there is an earthquake. But don't worry because most are so weak that they cannot be felt. Only a few big ones hurt people. Many earthquakes happened in China, such as the big one in Sichuan last month. Thousands of people died in it. So it's important to know what to do when one hits. Here are some tips on how to stay safe in an earthquake. a. If you are indoors during an earthquake, hide under a desk. Stay away from windows and anything that could fall on you. b. If you are outdoors, move to a clear place. Try to be away from trees, signs, buildings and streetlights. These could fall on you. c. If you are in a shop and far from the door, don't try to run outside and rush for exits (出口). Everyone will be doing that and you'll find it hard getting out. Don't get into a lift during an earthquake. Just hide under some strong cover near you. d. When an earthquake has ended, be careful because aftershocks may still happen. These are just as dangerous as the earthquake itself. So stay under the desk until you make sure it's safe to get up. e. If you are at home and you smell gas (煤气), open the windows and get out of the building as quickly as you can. A gas line in your house may be broken. This could be very dangerous. 1. Most earthquakes are too _______ to hurt people.[ ]A. strongB. weak C. dangerous D. scary 2. If you are outdoors, it would be safe to _______.[ ]A. go to a playground B. stay under a tree C. stand by the window D. stay near the signs 3. If you're in a shop and far from the door, you'd better _______.[ ]A. rush to the door right away B. run after the people quickly C. hide yourself under a cover near you D. try to rush for exits 4. The best title of this passage is "_______".[ ]A. How dangerous the earthquake is B. How to be safe during an earthquake C. Don't be afraid of the earthquake D. An earthquake can hurt people 5. Which of the following statements is TRUE according to the passage?[ ]A. Most earthquakes are very dangerous, so we must be very careful every day. B. You'd better keep away from those things that may fall on you wherever you are. C. If you smell gas at home, try to hide under a desk and don't run outside quickly. D. Quite a few earthquakes hurt people. 查看答案
题型：单项选择题 以下关于ARDS的临床特点及实验室检查，正确的是（）A.呼吸浅快，频率>28次／分B.早期体征为双侧肺底湿啰音C.X线早期可见支气管充气征D.病理过程分为渗出期、增生期和坏死期E.肺动脉平均压力12cmH2O 查看答案
题型：单项选择题 目前，有许多正在装修的家庭缺乏家装常识和经验，自作主张，随心所欲。而有些家装公司为了经济利益更是推波助澜，对业主要求唯命是从。但装修后终究是住户自己居住，如果留下隐患，造成邻里纠纷，出现质量事故，只能自食其果。 这段话的意思是( )。A．装修不能随心所欲，要注意质量B．家装公司装修不认真C．正在装修的家庭缺乏家装常识D．装饰后的房屋由住户自己居住 查看答案