热门试题:
[判断题]星形连接和三角形连接的三相对称负载的功率可用同一个公式计算。
A.正确
B.错误
[单选题]工业盐酸因含杂质(一般含铁离子)而呈( )。
A.红色
B.黄色
C.粉色
[单选题] 线路验电时应戴绝缘手套。
A.正确
B.错误
[单选题]钢构支架、水泥杆在现场倒运时，宜采用起重机械装卸，装卸时应控制杆段（ ）
A.A.平衡
B.B.平稳
C.C.重心
D.D.方向
[单项选择]任何单位、（）都有参加有组织的灭火工作义务。
A. 义务消防队员
B. 个人
C. 成年公民
[单项选择]呕吐伴眩晕，眼球震颤可见于
A. 脑出血
B. 脑栓塞
C. 颅内血肿
D. 梅尼埃综合征
E. 糖尿病酮症酸中毒
[单选题]施工中发生紧急事件时，承包单位应立即（），保护好工作现场，并及时汇报发包单位，待查明原因，经发包单位批准同意后，方可重新开始施工。
A.离开现场
B.汇报领导
C.停止工作
D.查明原因
[填空题]My mother is a music fan and she enjoys ______ (sing) very much.
[单选题][T]BJ009 4 1 3
下列选项中,( )属于冷干机易损部件,需经常清洗维护。
A.空压机
B.过滤器
C.储气罐
D.压缩机
[多选题]关于输电线路工程施工区布置说法正确的是（）。
A.施工区域应设置施工现场风险管控公示牌
B.要机械设备应设置设备状态牌和操作规程牌
C.基础施工场地采用安全围栏进行围护、隔离
D.牵、张场应布置休息室、工具房和指挥台
E.略
F.略
[单选题]《中国石化云南石油分公司便利店进销存管理办法》的生效日期[1.0]
A.43794
B.43763
C.43824
D.43733
[多选题]HSE作业计划书的编写原则( )
A.完整
B.简练
C.实用
D.适时
[多选题]干式喷水灭火系统适用的环境温度为()。
A. 低于4摄氏度
B. 高于4摄氏度
C. 高于70摄氏度
D. 低于70摄氏度
E. 不限
[单选题]四川丹巴“碉楼”建筑的主人是( )。
A.白族
B.羌族
C.藏族
D.彝族
[单项选择]Until men invented ways of staying underwater for more than a few minutes, the wonders of the world below the surface of the sea were almost unknown. The main problem, of course, lies in air. How could air be provided to swimmers below the surface of the sea Pictures made about 2,900 years ago in Asia show men swimming under the surface with air bags tied to their bodies. A pipe from the bag carried air into the swimmer’s mouth. But little progress was achieved in the invention of diving devices until about 1490, when the famous Italian painter, Leonardo da Vinci, designed a complete diving suit.
In 1680, an Italian professor invented a large air bag with a glass window to be worn over the diver’s head. To "clean" the air a breathing pipe went from the air bag, through another bag to remove moisture, and then again to the large air bag. The plan did not work, but it gave later inventors the idea of moving air around in diving devices.
In 1819, a German, Augustus Siebe, develo
[判断题]允许速度大于120km/h的线路,有垫层时碎石道床厚度不得小于200mm。( )
A.正确
B.错误
[单选题]认为“真理是‘绝对理念’的自我显现”的真理观属于()。
A.客观唯心主义真理观
B.主观唯心主义真理观
C.机械唯物主义真理观
D.辩证唯物主义真理观
[单选题] 电气工作开始前,必须完成()
A.、工作许可手续
B.、交接班手续
C.、工作间断手续
[单项选择]月经周期缩短，月经频发，习惯性流产，可能是（）
A. 经量过多
B. 黄体功能不足
C. 子宫内膜不规则脱落
D. 子宫不规则出血
E. 月经过多
[单选题]25T型客车的可编程控制器(简称PLC)供电后，绿色PWR灯亮，橙色()灯亮，红色ERR灯灭；连接触摸屏或网关后橙色COM灯闪烁。
A.FH
B.XS
C.ZD1
D.RUN
[单项选择]《类经附翼·医易》“动极者镇之以静，阴亢者胜之以阳”，主要说明了阴阳之间的什么关系
A. 阴阳互根
B. 阴阳对立
C. 阴阳平衡
D. 阴阳制约
[判断题]通讯中断时，发生在车站，机按照车载台、800M、400M、站台电话的优先级顺序联系车控室
A.正确
B.错误
[单项选择]
Pushbike Danger
Low speed bicycle crashes can badly injure -- or even kill -- children if they fall onto the ends of the handlebars (车把). So a team of engineers is redesigning it to make it safer.
Kristy Arbogast, a bioengineer at the Children’s Hospital of Philadelphia in Pennsylvania, began the project with her colleagues. The cases they reviewed about serious abdominal (腹部的) injuries in children in the past 30 years showed that more than a third were caused by bicycle accidents, "The task was to identify how the injuries occurred and come up with some countermeasures," she says.
By interviewing the children and their parents, Arbogast and her team were able to reconstruct many of the accidents and identified a common cause for serious injuries. They discovered that most cases occur when children hit an obstacle at slow speed, causing them to topple (摇摆) over. To maintain their balance the children turn the handlebars through 90 de
A. they are not beautiful.
B. they may kill children.
C. they are likely to crash.
D. they affect the speed of the bike.
[单选题]若室外只有个别地点设备带电，可在其四周装设全封闭遮栏，遮栏上悬挂适当数量朝向外面的（ ）标示牌。
A.“从此进出!”
B.“禁止攀登，高压危险!”
C.“止步，高压危险！”
[判断题]加工贸易手册中商品编号与实际商品编号不符的，应按照加工贸易手册中商品编号填报。 ( )
[判断题]气门驱动机构主要由摇臂、横臂、推杆、顶杆和凸轮轴等组成。 ( )
A.正确
B.错误
[多选题]一个UE内部ACK/NACK和CQI之间可能采用的复用方法（）。
A.CDM复用
B.TDM复用
C.FDM复用
D.以上3种的集合
[单项选择]人力资本投资不包括( )。
A. 有形支出
B. 无形支出
C. 心理损失
D. 物质成本
[单选题]柴油机超速(飞车)的现象有( )。
A.机油压力过高
B.转速升高或突然升高,超过允许的最高转速,疾转不止,失去控制
C.排气管排白烟
[判断题]加压开启雨淋报警阀是指平时控制腔为常压，通过向控制腔施加一定压力使其开启的雨淋报警阀。()
A.正确
B.错误
[判断题]没有调度命令，擅自改变或错办列车运行径路，应按照未办或错办闭塞发出列车处理。（）
A.正确
B.错误
[判断题]过滤式呼吸器是靠过滤原理清除空气中有毒物，亦称净化呼吸器，这类设备在空气中含氧量不低于18%时使用
A.正确
B.错误
[判断题]精密量具应实行定期鉴定和保养，发现精密量具有不正常现象时，应及时送交计量室检修。
A.正确
B.错误
[单选题]检查空气呼吸器空气储存压力,一般应在( )之间。
A.10~11 分钟
B.10~11 MPa
C.28~30 分钟
D.28~30MPa
[单项选择]
Immigration and Problems
Hundreds of thousands of people supporting immigration fights in the U.S. filled streets all over America in early 2006. Many held signs and American flags and asked to be treated as citizens not criminals. Many of these supported legislation from Senator John McCain that would open a path to citizenship to immigrants who were already in the country illegally. Proposed legislation from other politicians called for stricter measures, including rounding up undocumented immigrants and sending them back to their home countries.
Canadian officials say that immigration applications continue to rise. Some want to keep the doors open. They need the labor. About 400,000 immigrants were allowed into the country in 2005, according to the Canadian Government statistics. However, all this growth means that cities need to adapt. Newcomers don’t always make a smooth transition into jobs for which they are skilled. So indust
A. animals
B. citizens
C. civilians
D. criminals
[单项选择]The ship（）about 1/2 miles southward of the lighthouse.
A. moors
B. moor
C. is moored
D. mooring
