起重机吊钩断裂会导致重大的人身及设备事故。下图所示为几种吊钩的断面。其中，只允许用于 发布时间：2017-06-21 09:39 │ 来源：www.tikuol.com 题型：单项选择题 问题： 起重机吊钩断裂会导致重大的人身及设备事故。下图所示为几种吊钩的断面。其中，只允许用于小型起重设备的吊钩是（）断面的吊钩。A．圆形B．片式C．梯形D．T字形
题型：单项选择题 阅读理解。 A Four-Day Tour to Beijing Price: only ￥1,090, including the round-trip plane ticket, the bus service around Beijing and threenights'stay in good hotels with the best tour guide service. 23rd Visiting the Great Wall and the Ming Tombs. 24thVisiting Beijing Zoo, the Palace Museum, the Summer Palace in the day. Visiting the Bird's Nest and the Water Cube in the evening. 25thVisiting Tian'anmen Square in the early morning. Visiting the Grand National Theater in the afternoon. Visiting Wangfujing Street in the evening. 26thShopping freely. Office hours: Monday-Friday: 9:00 am---8:00 pm Saturday: 9:00 am---4:30 pm Tel:010-81695565 1. From the passage, we know that this is ______. [ ]A. a noticeB. an advertisement C. a postcard D. a sign 2. If you take a tour to Beijing on June 23rd, you will return on ______. [ ]A. June 26th B. June 25th C. July 26th D. July 25th 3. On the third day of your trip, you can _____ in the morning. [ ]A. go to the Great Wall B. watch animals in Beijing Zoo C. watch the national flag rise on Tian'anmen Square D. visit something about the 2008 Beijing Olympic Games 4. The price of the tour does NOT include ______. [ ]A. the bus service B. the hotels C. the plane tickets D. the meals 5. Which of the follow is TURE according to the passage? [ ]A. If you book the tour early, you don't have to pay 1,090 for it. B. You can book the tour after 9:00 on Monday morning. C. You can book the tour at 5:30 on Saturday afternoon. D. If you want to book the tour, you can call the office at 010-81695665. 查看答案
题型：单项选择题 设nA为阿伏加德罗常数的数值，下列说法正确的是A．常温常压下，22.4 L CH4中含有4 nA个C-H键B．1 mol Fe与足量稀硝酸反应，转移2 nA个电子C．0.5 mol·L－1 FeCl3溶液中含有1.5 nA个Cl－D．常温下，22g CO2含有nA个氧原子 查看答案
题型：单项选择题 当甲型HlNl流感蔓延后，根据知情、同意、自愿、免费接种的原则，我国政府通过财政支出为群众免费接种疫苗。这体现了国家财政A．是改善人民生活的物质保障B．具有促进资源合理配置的作用C．具有促进经济平稳运行的作用D．是提高经济效率的物质基础 查看答案
