热门试题:
[填空题]列车运行图是铁路运输工作的综合计划和<--NRC-->的基础。
[填空题]混凝土施工中如采用大于( )的混凝土,砂石加热时的最高温度不得大于60℃。
[单选题]可燃液体与易燃液体是以闪点作为划分标准的,闪点<()的可燃液体称为易燃液体。
A.0℃
B.60℃
C.36℃
D.61℃
[判断题](466124)( )敏化电极属于离子选择性电极。(1.0分)
A.正确
B.错误
[判断题]无源应答器和有源应答器默认报文的报文计数器设定为0。()
A.正确
B.错误
[填空题]边坡清筛最大挖掘深度应距轨面下()mm。
[单项选择]According to the passage, why did the first people who came to North America leave their homeland
A. They were hoping to find a better climate.
B. They were seeking freedom.
C. They were following instructions given in a dream.
D. They were looking for foo
[单选题]技师论文答辩的准备工作主要包括以下几方面的内容:( )。
A.熟读论文
B.准备材料
C.写发言提纲
D.以上都对
[多选题]下穿铁路桥梁、涵洞的道路应当按照国家标准设置( )。
A.车辆通过限高标志
B.限宽标志
C.限高防护架
D.限速标志
[单选题]列车开车后,车辆乘务员发现漏交证明书时,须立即使用无线列调通讯设备或G网手机,通知司机转报列车调度员或车站值班员申请在前方站停车,并于停车后向司机补交证明书。司机得到通知后应以不超过( )km/h运行至前方站停车。
A.100
B.120
C.140
D.80
[单项选择]下列可伴有腹水或胸水的卵巢良性肿瘤是()
A. 纤维瘤
B. 成熟畸胎瘤
C. 卵泡膜细胞瘤
D. 浆液性囊腺瘤
E. 卵泡膜细胞瘤
[判断题]输变电工程由于是线性工程,施工地点比较分散,因此其水土流失防治标准均降低执行。
A.正确
B.错误
[单选题]CIMS指的是:( )。
A.全面质量管理
B.无人化工厂
C.计算机集成制造系统
D.柔性制造系统
[判断题]要求列车减速运行,昼间用展开的黄色信号旗,在头上左右摇动。
A.正确
B.错误
[判断题]在挖深超过2m的坑内工作时,应采取安全措施,如戴防毒面具、向坑中送风和持续检测等。监护人应密切注意挖沟(槽)人员,防止煤气、硫化氢等有毒气体中毒及沼气等可燃气体爆炸。
A.正确
B.错误
[单选题]施工单位应当在施工现场显著位置公告危大工程名称、施工时间和具体责任人员,并在危险区域设置( )标志。
A.A-安全警示
B.B-提示
C.C-禁止
D.D-告知
E.掠
F.掠
G.掠
[单选题]若专责监护人必须长时间离开工作现场时,应由( )变更专责监护人,履行变更手续,并告知全体被监护工作人员。
A.A.工作票签发人
B.B.工作负责人
C.C.小组负责人
D.D.工作许可人
[单项选择]工资、薪金所得可以实行按年计算,分月预缴,年度终了汇算清缴,多退少补的行业是 ( )。
A. 高空行业
B. 高温行业
C. 采掘业
D. 保险业
[单选题] 车钩在闭锁位置时,向上托起钩锁铁,其活动量为()
A.2-10mm
B.3-12mm
C.2-15mm
D.3-20mm
[判断题]电路处于通路状态时,负载两端的电压等于电源电动势。
[单选题]铅蓄电池放电时,负极板铅释放电子,在电解液作用下变为硫酸铅。
A.A
B.B
[单选题]对胸锁关节的正确描述是 ( )
A.是上肢骨与躯干骨连结的唯一关节
B.由锁骨的胸骨端和胸骨的锁切迹构成
C.属单轴关节
D.关节内无关节盘
E.锁骨只能做上、下运动
[单选题]按《铁路货车统计规则》编号,18点现在重车去向报表是( )。
A.运报-1
B.运报-2
C.运报-3
D.运报-4
[多选题]塔式起重机安装、拆卸作业相关的建筑施工特种作业人员有(
A.塔式起重机安装拆卸工
B.建筑起重司索信号工
C.塔式起重机司机
D.建筑电工
E.钢筋工
[判断题]跨局回送机车中途临时变更径路时,由铁路总公司调度命令确定。
A.正确
B.错误
[单项选择]A New Method to Kill AIDS Virus
_________(46). But researchers won’’t know for a year or more whether it will work, scientist David Ho told journalists here Wednesday for the Fourth Conference in Viruses and Infections.
"This is a study that’’s in progress," said Ho, head of the Aaron Diamond AIDS Research Center, New York.
The study involves 20 people who started combinations of anti-HIV drugs very early in the course of the disease, within 90 days of their infections. They’’ve been treated for up to 18 months. Four others have dropped out because of side effects or problems complying with the exacting drug system.
The drugs have knocked the AIDS virus down to undetectable levels in the blood of all remaining patients. And, in the latest development, scientists have now tested lymph nodes (淋巴结) and semen (精液) from a few patients and found no virus reproducing there._________(47).
Ho has calculated that the drugs should be able to wipe out remaining viruses—at
[判断题]主轴颈总数等于或少于连杆轴颈的曲轴叫全支承曲轴。
[单选题]发生心绞痛的最主要的原因是
A.主动脉瓣狭窄
B.主动脉痉挛
C.全身小动脉痉挛
D.冠状动脉粥样硬化
E.肺动脉痉挛
[单选题] 2000 版 ISO9000 族标准采用了以( )为基础的质量管理体系模式。
A.过程
B.结果
C.前提
D.原由
[填空题]清代书法一方面沿着明代()一脉继续向前发展,一方面由于金石考据学的兴起、访碑热潮的出现以及书法观念的改变,()一脉迅猛发展,渐成()衰微、()兴盛的局面。于是,清代成为中国书法史的一个重要转折时期。
[判断题]电缆油是导电性能好,介电强度较小的绝缘体。
[单项选择]()是食品添加剂的意思。
A. Freshflour
B. Foodpowder
C. Freshcream
D. Foodadditive
[多选题]为生产、生活所设的()应有围栏或盖板。
A.坑
B.壕
C.池
D.窨井
[判断题]大小和方向随时间变化的电流称为交变电流,用小写字母i表示。
A.正确
B.错误
[多选题] 结膜吸吮线虫的治疗方法有
A.用l%地卡因或2%普鲁卡因滴眼后,用镊子取出虫体
B.若虫体寄生在前房可行角膜缘切开取虫术
C.虫体较多者,常须经过多次治疗
D.口服甲苯咪唑
E.行眼球摘除术
[判断题]临时用电也执行两部制电价。
A.正确
B.错误
A.正确
B.错误
[单项选择]
People faint (晕倒) when the normal blood supply to the brain is suddenly out down. This can happen if they are surprised or shocked by sudden news or something they see. Some people faint if they see others hurt. Some people faint in crowds. Others faint if they are a in a room that is hot and stuffy (不通气的,闷热的).
If a person faints while standing, lay him down. If his face is pale, lift his feet. If he is sitting down when he faints, place his head between his knees. Loosen any tight clothing that might keep him from breathing easily. If possible, place a cold, wet cloth on his forehead (前额).
If you feel faint, it is best to( ).
A. run about
B. lie flat
C. move slowly
D. stand up
[单项选择]
With hundreds of millions of electronic()taking place daily, businesses and organizations have a strong incentive to protect the()of the data exchanged in this manner, and to positively ensure the()of those involved in the transactions. This has led to an industry-wide quest for better, more secure methods for controlling IT operations, and for deploying strong security mechanisms deeply and broadly throughout networked infrastructures and client devices. One of the more successful concepts to engage the imaginations of the security community has been the development of standards-based security()that can be incorporated in the hardware design of client computers. The principle of encapsulating core security capabilities in()and integrating security provisions at the deepest levels of the machine operation has significant benefits for both users and those responsible for securing IT operations.
The principle of encapsulating core security capabilities in()and integrating secu
A. software
B. form
C. computer
D. silicon
[单项选择]女,26岁,G1P0,孕39+4周临产,宫缩持续40秒,间隔1~2分钟,宫口开全近2小时,阴道口不见胎头,却见一薄膜膨隆突出。可能是以下哪种情况()
A. 头盆不稳
B. 阴道闭锁
C. 阴道横隔
D. 阴道纵隔
E. 子宫脱垂