热门试题:
[判断题]限用是指校验对象的技术参数不能在标准覆盖区域内全部符合有关民用航空通信导航监视设备飞行校验标准中规定的标准值和容差，但在部分区域内符合上述规定的标准值和容差。
A.正确
B.错误
[单项选择]下列有关外存储器的描述不正确的是
A. 外存储器不能为CPU直接访问，必须通过内存才能为CPU所使用
B. 外存储器既是输入设备，又是输出设备
C. 外存储器中所存储的信息，断电后信息也会随之丢失
D. 扇区是磁盘存储信息的最小单位
[单项选择]为了防止铸件产生缩孔和缩松，在冒口的有效补缩范围内，必须保证铸件实现（）凝固。
A. 同时
B. 定向
C. 逐层
D. 糊状凝固
[单项选择]在观测次数相对不多的情况下，可以认为大于（）倍中误差的偶然误差实际是不可能出现的。
A. 1
B. 2
C. 3
D. 4
[判断题]2.19 临时入境后仅在边境地区一定范围内行驶的外国机动车,不需要办理临时入境机动车号牌、行驶证。
A.正确
B.错误
[多选题]青霉素过敏性休克的中枢神经系
统症状有
A.肺水肿
B.面色苍白
C.意识丧失
D.抽搐
E.大小便失禁
[单项选择]The evolution of artificial intelligence is now proceeding so rapidly that (26) the middle of this century cheap computers (27) larger than portable typewriters will (28) that will be able to solve almost any (29) faster and more efficiently than we can. "Intelligence" in a machine, (30) in a human, is best (31) as the ability to solve complex problems swiftly. This (32) involve medical analysis and prescriptions, (33) legal matters— (34) short, replacing the profession of lawyers completely or in (35) war games : in other words, (36) governments whether (37) not to go to war. (38) computers have already intensified the deadlines of weapons, the prospect is that they will (39) the more beneficial role of preventing wars. (40) asked to estimate the chances of victory, the computer will analyze facts (41) from the lifelong military expert
A. yes
B. not
C. no
D. all
[填空题]一般交流轨道电路专指工频 Hz的轨道电路。
[判断题]《国务院关于进一步加强企业安全生产工作的通知》要求，企业发生重大生产安全责任事故，追究事故企业主要负责人责任；触犯法律的，依法追究事故企业主要负责人或企业实际控制人的法律责任。（ )
A.正确
B.错误
[多选题]各装车单位应建立健全装车岗位责任制，坚持（ ）的原则，严格按装载加固方案装车。
A.装车从严
B.发站从严
C.追责从严
D.把关从严
[判断题]硫酸镍生产中15kt/a和30kt/a系统除油工艺相同。
[简答题]你单位要做一个关于人员在各领域流通的调查，要你制定一个调查方案，你怎么做？
[不定项选择题]共用题干
Sharks Perform a Service for Earth's Waters
It is hard to get people to think of sharks as anything but a deadly enemy. They are thought to1people frequently. But these fish perform a2service for earth's waters and for human beings. Yet business and sport fishing are threatening their3.Some sharks are at risk of disappearing from4.
Warm weather may influence both fish and shark activity. Many fish swim near coastal areas5their warm waters. Experts say sharks may follow the fish into the same areas,6people also swim. In fact,most sharks do not purposely charge at or bite humans. They are thought to mistake a person7a sea animal,such as a seal or sea lion. That is why people should not swim in the ocean when the sun goes down or comes up.Those are the8 when sharks are looking for food. Experts also say that bright colors and shiny jewelry may cause sharks to attack.
A shark has an extremely good sense of smell. It can find small amounts of substances in wa-ter,such as blood,body liquids and9 produced by animals. These powerful10help sharks find their food. Sharks eat fish,any11sharks,and plants that live in the ocean.
Medical researchers want to learn more about the shark's body defense,and immune 12against disease. Researchers know that sharks13quickly from injuries. They study the shark in hopes of finding a way to fight human disease.
Sharks are important for the world's14.They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too15．This protects the plants and other forms of life that exist in the oceans.
9._________
A.sciences
B.mathematics
C.chemicals
D.physics
[多选题]下列关于马头门开挖及支护作业过程的安全管控，说法正确的有（）。
A.马头门开挖后应及时封闭成环
B.施工过程中应加强对地表下沉、马头门结构拱顶下沉的监控量测，发现异常时应及时采取措施
C.同一竖井、联络通道内的马头门可同时施工
D.一侧隧道掘进15m后，方可开启另一侧马头门
E.略
F.略
[判断题]已终结的工作票（含工作任务单）、故障紧急抢修单、现场勘察记录至少应保存2年。
A.正确
B.错误
[单项选择]You must segement your internal 192.168.1.0/24 network into a minimun of 12 subnet, each containing a minimun of 12 hosts. Which network mask do you use?（）
A. /26
B. /27
C. /28
D. /29
[单项选择]I didn't know ______ or stay here.
A. either to go
B. whether to go
C. if to go
D. if that I should go
[单选题] 正常颈部血管多普勒超声表现不正确的是:
A. 颈动脉血流呈层流
B. 颈动脉血流为中央明亮、外周暗淡样色彩
C. 颈内、外动脉分叉膨大处见少许紊乱的彩色血流
D. 椎动脉与同侧颈动脉血流颜色相同
E. 椎动脉血流为湍流
[判断题]3.235. “掌上电力”中被共享人可以查看共享人的全部用电信息。
A.正确
B.错误
[判断题]《铁路技术管理规程》中规定，站内平过道必须与站外道路和人行道路断开，禁止社会车辆、非工作人员通行，平过道不得设在车站两端咽喉区内。
A.正确
B.错误
[单项选择]What does the girl mean （）
A. They will go fishing tomorrow.
B. They won’t go fishing tomorrow.
C. They will ask their teacher to go with them.
D. Their teacher is not friendly.
[单选题]视觉障碍是由于损伤了
A.嗅神经
B.视神经
C.动眼神经
D.三叉神经
E.面神经
[填空题]NetWare提供了4级安全保密机制：注册安全性、用户信任者权限、目录与文件属性和 ______功能。
[单选题]我国剥削制度被消灭的标志是（ ）
A.中华人民共和国的成立
B.全国土地改革的完成
C.“三大改造”的基本完成
D.“镇压反革命”运动的胜利
[判断题]竖曲线不得与竖曲线、缓和曲线重叠，必要时可以侵入道岔及无砟桥梁上。
A.正确
B.错误
[单选题]供消防救援人员进入的窗口的净高度和净宽度分别不应小于（）。
A.0.8m，1.0m
B.1.0m，1.0m
C.0.8m，1.2m
D.1.0m，1.2m
[单选题]加强（）管理，完善应急指挥系统，强化预案管理，提高应急管理水平和应急处置能力。
A.应急
B.防风
C.防汛
D.人员
[单项选择]在完全二叉树中，若一个结点为叶结点，则它没有什么
A. 右子结点
B. 左子结点
C. 右子结点和左子结点
D. 右子结点、””左子结点和兄弟结点
[不定项选择题]A.吗啡阿托品注射液
A.三唑仑
B.巴比妥
C.地西泮
D.氨酚氢可酮片
E.按第一类精神药品管理的是
[判断题]B-757飞机洗手间的水加热器是随机上电源接通而工作的，不可人工操纵开关。
A.正确
B.错误
[多选题]340.“一炮三检”是指：装药前、( )，分别检查风流中的瓦斯。
A.A、打眼前
B.B、放炮前
C.C、放顶后
D.D、放炮后
[单项选择]CAS—OB工艺具有（）。
A. 吹氩功能
B. 脱气功能
C. 电磁搅拌功能
[单选题]下列对总承包单位和分包单位安全责任的描述中，错误的是( )。
A.建设工程实行总包和分包的，总承包商具有施工现场的统一管理权
B.总承包单位和分包单位对整体工程的安全生产承担连带责任
C.分包单位不服从管理导致生产安全事故的，由分包单位承担主要责任
D.建设工程实行施工总承包的，由总承包单位对施工现场的安全生产负总责
