热门试题:
[单选题]在有感应电压的线路上使用绝缘电阻表测量绝缘时,应将相关线路同时停电,方可进行。
A.正确
B.错误
C./
D./
E./
F./
[单选题]矿用橡套软电缆U系列中结构特性代号为P的所代表的含义为()。
A.金属屏蔽
B.监视
C.非金属屏蔽
D.编织加强
[判断题]gNodeB的QoS管理包括无线Qos管理和传输0oS管理。无线QoS管理保障了DRB的QoS体验,传输Qo5管理保障了QoS 的QoS体验
A.正确
B.错误
[单选题]
怀孕母犬的营养适合在( )期间增加质量。
A. 怀孕前期
B. 怀孕中期
C. 怀孕后期
D. 配种期
[多选题]混凝土强度必须达到设计的混凝土立方体抗压强度标准值的100%才能拆除底模及支架的混凝土构件有()。
A.悬臂构件
B.跨度小于等于8m板
C.跨度大于8m拱
D.跨度大于8m梁
E.跨度小于等于8m梁
[多项选择]一般车身电控系统用传感器的有源辅助电源基准电压有()。
A. 2V
B. 5V
C. 9V
D. 12V
E. 0V
[单选题]( )表示在一定压力下,温度增加1K时流体密度的相对减小率。
A.压缩系数
B.热膨胀系数
C.流动系数
D.蒸发系数
[单项选择] Passage 3
Questions 11 to 15 are based on the following passage:
The vitamins necessary for a healthy body are normally supplied by a good mixed diet (饮食) , including a variety of fruits and green vegetables. (79) It is only when people try to live on a very restricted diet that it is necessary to make special provision to supply the missing vitamins.
An example of the dangers of a restricted diet may be seen in the disease known as“beri-beri”。 (80) It used to distress large numbers of Eastern peoples who lived mainly on rice. In the early years of this century, a scientist named Eijkman was trying to discover the cause of “beri-beri”。 At first he thought it was caused by a germ. He was working in a Japanese hospital, where the patients were fed on polished rice which had the outer husk (外壳) removed from the grain. It was thought this would be easier for weak and sick people to digest.
Eijkman thought his germ theory was confmned when he noticed the chickens in th
A. was cheaper than unpolished rice
B. was less nourishing (有营养的) than unpolished Ace
C. was more nourishing than unpolished rice
D. cured “beri-beri”
[单选题](2018年)下列污染物中,不属于环境保护税征税对象的是( )。
A.大气污染物
B.工业噪声污染
C.固体废物
D.光污染
[单选题]动车组列车正、反向运行定义:原则上,当动车组运行方向为( )方向,且车厢编号小号在前、大号在后时为正向运行,反之,为反向运行。
A.上行
B.下行
C.正
D.反
[单选题]前置胎盘的主要症状为( )
A.胎位异常
B.胎先露高浮
C.子宫大于符合孕周
D.子宫硬如板样
E.无痛性反复流血
[判断题]霍桑实验的目的是研究一定环境因素的改变对装配线工人劳动效率的影响。
[单项选择]以下哪个选不属于精准营销中短信接待的功能的是()。
A. 留言转短信
B. 短信重发产品信息
C. 客户到访通知
D. 自动短信回复
[判断题]旅客行李中可能会含有达到危险物品标准的物品,例如烟火,家用易燃液体等
A.正确
B.错误
[判断题]申报、配合查验、缴纳税款、提取或者装运货物、核销、销案是进出口货物报关的基本环节.( )
A.正确
B.错误
[单选题]一类信息系统纵向贯通全部中断,且持续时间( )小
时以上,二类信息系统纵向贯通全部中断,且持续时间( )小时以上,三类信息系统纵向贯通全部中断,且持续时间( )小时以上属于七级信息系统事件。
A.1;3;24
B.12;1;4
C.24;2;8
D.3;6;48
[多选题]我行大额存单种类有
A.个人大额存单
B.单位大额存单
C.公司大额存单
D.机构大额存单
[单选题]道德是人们用来评价别人和自己言行的标准与()。
A.要求
B.尺度
C.目标
D.对错
[单选题]单选题热炉放水余热烘干法是指锅炉停运后,压力降到0.05~0.1MPa时,迅速放尽锅内存水。利用( )烘干受热面。
A.邻炉热风
B.炉膛余热
C.负压余热
D.干燥剂
[多选题]监理、施工项目部应张挂“三级及以上施工现场风险管控公示牌”,将三级及以上风险( )、颜色标示、工作负责人、现场监理人员、计划作业时间进行公示,并根据实际情况及时更新,确保各级人员掌握作业风险。
A.A.作业地理位置信息
B.B.作业内容
C.C.风险等级
D.D.管控措施
[单项选择] The Central Dogma
Though it comes as no surprise that the composition of DNA between different organisms is different, it is not immediately obvious why the muscle cells, blood cells, and brain cells of any one particular vertebrate(脊椎动物) are so different in their structure and composition when the DNA of every one of their cells is identical. This is the key to one of the most exciting areas of modern cell biology. In different cell types, different sets of the total number of genes (genome) (基因组) are expressed. In other words, different regions of the DNA are "active" in the muscle cells, blood cells, and brain cells.
To understand how this difference in DNA activity can lead to differences in cell structure and composition, it is necessary to consider what is often known as the central dogma(法则) of molecular biology: "DNA makes RNA make protein. " In molecular terms, a gene is that portion of DNA that encodes for a single protein. The dictum" o
A. The metabolism of cell is regulated by a group of proteins.
B. All the enzymes act as biological catalysts.
C. Cholestrol is a kind of lipid.
D. The Chemical reactions could not take place without enzymes.
[单项选择]主动脉瓣狭窄()
A. 水冲脉
B. 交替脉
C. 奇脉
D. 重脉
E. 细脉
[单项选择]味觉发育的关键时期()。
A. 2~3个月
B. 3~4个月
C. 4~5个月
D. 5~6个月
E. 6~7个月
[单选题] 备用的闸流管每月应以额定的灯丝电压加热( )h。
A.1
B.2
C.2.5
D.3
[单项选择]在下列情况中,出现心悸时伴有心律失常的是()
A. 生理性,紧张,敏感,浓茶,烟酒等
B. 各种原因如高血压、退行性瓣膜等引起心室肥大等
C. 某些药物如肾上腺素、麻黄素等
D. 高动力循环状态如发热,贫血,甲状腺功能亢进
E. 高度房室传导阻滞(Ⅱ、Ⅲ度房室传导阻滞)
[判断题]《上海铁路局客运安检人员着装管理办法》(上铁客〔2017〕402号)规定,车站在与劳务单位签订合同时,应将安检人员制式服装管理相关规定一并纳入合同或合同附件。
A.正确
B.错误
[单选题]溢流时出现酸性气体(H2S、CO2等),很容易腐蚀和破坏钻具,需提高压井液的pH值在( )以上
A.9.5
B.7
C.11
D.10.5
[单选题]"横向分布"针对几个及以上的对象?
A.A:2
B.B:3
C.C:4
D.D:5
[单选题](34) 集成计数器 40192 置数方式是()。
A.A.同步 0 有效
B.B.异步 0 有效
C.C.异步 1 有效
D.D.同步 1 有效
[单选题]下列关于合同效力的说法,错误的是:
A.基于重大误解签订的合同属于可变更、可撤销合同
B.被欺诈、胁迫签订的合同属于无效合同
C.欠缺代理权签订的合同属于效力待定合同
D.损害社会公共利益签订的合同属于无效合同
[单选题]单选题:丢失1把及以上保险柜钥匙或自动售票机维修门钥匙或钱箱座钥匙或钱箱钥匙或副找零器上盖钥匙(补币箱钥匙)等涉及票务收益安全的钥匙的,应定性为( )。
A.票务违规事件
B.一类票务事故
C.二类票务事故
D.三类票务事故
[判断题]CRH380B(L)牵引电机注脂周期:头车3、4 轴驱动端:10 万公里/90 天,其他轴:20 万公里/180 天
A.正确
B.错误
[判断题]跑步换踏步,听到口令,继续跑 2 步,然后换踏步。( )
A.正确
B.错误
[单选题]捣固车一次起道量不宜超过()mm。
A.30
B.50
C.60
D.80
[单项选择]柔软的分叶状肿物是()。
A. 脂肪瘤
B. 纤维瘤
C. 皮脂腺囊肿
D. 神经纤维瘤
E. 蔓状血管瘤