热门试题:
[单选题]萃取剂的选择性系数是溶质和原溶剂分别在两相中的。
A.质量浓度之比
B.摩尔浓度之比
C.溶解度之比
D.分配系数之比
[判断题]电流互感器通常将原绕组的端子用字母L1、L2(或S1、S2)表示,副绕组端子用字母K1、K2表示,则L1与K1、L2与K2分别为同极性端。( )
A.正确
B.错误
[多项选择]神经性皮炎有以下哪些特点区别于慢性湿疹：（）
A. 先痒，后呈苔藓样变
B. 皮损呈正常肤色苔藓化斑片，外周有正常肤色扁平丘疹
C. 皮损呈紫红色苔藓化斑片，外周有紫红色扁平丘疹
D. 好发于颈项、骶尾、四肢伸面
E. 慢性病程，反复发作，无渗出史
[单选题]任何使用高毒物品作业的用人单位，应当配备（）和必要的应急救援器材、设备，制定事故应急救援预案
A.应急救援人员
B.主要负责人
C.管理人员
[单项选择]对取暖设施应进行全面检查，加强用火管理，及时清除（）周围的易燃物。
A. 垃圾站点
B. 配电室
C. 库房
D. 火源
[填空题]救援列车移至车站后，机车与救援列车第一辆车的车钩、软管的摘挂、摘结由机车乘务员负责。开车前的简略试验由（ ）负责。
[单选题]有开采价值的大面积含煤地层,称为( )。(0.03分)
A.煤田
B.井田
C.煤层
[简答题](45372)什么是锁定轨温?(5分)(1.0分)
[单选题]一氧化碳中毒是由于含碳物质燃烧不完全时的产物经呼吸道吸入引起中毒，主要损害人的（ ）系统。
A.呼吸
B.消化
C.神经
[简答题]TB/T2658.21—2007标准对轨腰部位串列式扫查时探伤灵敏度是怎样规定的？《铁标》
[判断题]地震灾害发生时,要正确选择指挥部和消防车辆停放的位置,为方便指挥,要选择离建筑物近的地方。( )
A.正确
B.错误
[判断题]换闸瓦时须关闭塞门129#。( )
A.正确
B.错误
[判断题]避免在覆盖泡沫的流淌液体中走动，禁止跑动，防止破坏覆盖层加速液体蒸发。（ ）
A.正确
B.错误
[单项选择]One of the most popular ideas of our time is the notion that in judging a young person’s future success, we’ve become imbalanced, giving too much credit to whether a child has learned the stuff of textbooks, and too little value to whether that child has learned the stuff of real life.
The (67) is a whole collection of behaviors and skills, from creativity to emotional-intelligence to self-discipline to (68) judgment. In this model, the elements of real life success are characterized as highly generalizable, useful (69) from the urban street corner to the meeting room. (70) , the elements that go into (71) learning are characterized as being (72) applicable, useful only for getting into college.
It’s commonly said that the SAT, (73) in a senior year of high school, has only about a 40% correlation (相关性) with a student’s freshman year college GPA. If it’s that (74) at predicting how well a kid does in colleg
[单项选择]免疫原性是指
A. 抗原分子能与应答产物发生特异性反应的特异性
B. 抗原分子不能与应答产物发生特异性反应的特性
C. 抗原分子能诱导免疫应答的特性
D. 抗原分子不能诱导免疫应答的特性
E. 抗原与载体结合后诱导免疫应答的特性
[多项选择]金融信用信息基础数据库从事信贷业务机构的一般管理员用户不得（）。
A. 擅自创建用户
B. 修改所创建用户的基本信息
C. 增加用户权限
D. 删除用户权限
[简答题] How Global Warming Works
Gases in the Earth’’s atmosphere act like glass in a greenhouse-trapping heat and making life on Earth possible. But there is a delicate balance. Burning coal, oil and natural gas increases atmospheric concentrations of these gases. Over the past century, increases in industry, transportation, and electricity production have increased gas concentrations in the atmosphere faster than natural processes can remove them leading to human-caused warming of the globe.
The Sources Of Global Warming
The major source of global warming is carbon dioxide pollution from power plants, auto mobiles, and industry. Another source is global deforestation.
●Power plants are responsible for more than a third of U. S. CO2 emissions, yet there are no caps on CO2 emissions from power plants or any other industry.
●Gas guzzling cars and light trucks are also responsible for a third of U.S. CO2 emissions. Current regulations allow fo
[填空题]眼球壁包括：（）、巩膜、虹膜、脉络膜、视网膜。
[判断题]设计单位应当向建筑施工企业提供与施工现场相关的地下管线资料,建筑施工企业应当采取措施加以保护
A.正确
B.错误
[单选题]《南昌局集团公司消防安全管理办法（试行）》（南铁安监〔2020〕108号）规定邮政车、行李车内应当有固定的严禁烟火的标志，货物堆码应当留有不少于（）的通道，高度不得超过货仓的月牙板，不得堵塞端、侧门。
A.0.5米
B.0.6米
C.0.8米
D.1米
[单项选择]一般情况下，组织每年搞庆典活动（）
A. 1次就够了
B. 5－6次就够了
C. 2－3次就够了
D. 10次就够了
[多项选择]全国银行间债券回购参与者主要包括( )。
A. 中国境内具有法人资格的商业银行
B. 中国境内具有法人资格的非银行金融机构
C. 中国境内具有法人资格的非金融机构
D. 经中国人民银行批准经营人民币业务的外国银行分行
[不定项选择题]共用题干
男，46岁。牙龈刷牙时出血3年。检查见全口牙石(++)，牙面色素多，牙龈中度红肿，探诊普遍有出血，探诊深度4～6mm，附着丧失2～4mm，未见牙齿松动。否认全身疾病史。
对该患者的治疗应包括下列内容，但一般不包括
A.口腔卫生指导
B.洁治术
C.刮治及根面平整
D.口服阿莫西林
E.牙周维护治疗
[单选题]作业人员应经医师鉴定，无妨碍工作的病症，体格检查每（ ）至少一次。
A.半年
B.一年
C.两年
D.三年
[简答题]橡胶衬里的交换器，直径2.5m，材质A3钢，采用双面焊接，焊缝系数Φ＝1.0，介质压力为0.8MPa，在常温下工作，许用应力［δ］＝117.7MPa（12kg/mm2），求交换器计算壁厚？（附加壁厚＝0.08cm）
[单项选择]生物转化后的生成物普遍具有的性质是（）
A. 毒性降低
B. 毒性升高
C. 极性降低
D. 极性升高
E. 极性不变
[单选题]鉴定食品中脂肪酸败的化学指标是（ ）。
A.K值
B.挥发性盐基总氮
C.三甲胺
D.二甲胺
E.过氧化值
[单选题] 电容器组投入运行的瞬间,由于电容器两端的电压不能跃变,相当于电源在电容器安装处( ?),因而形成频率很高、幅值很大的过渡性电流,称为合闸涌流。
A.发生短路
B.发生开路
C.发生拉弧
D.过载
[单项选择]Modern industrial society grants little status to old people. In fact, such a society has a system of built-in obsolescence. There is no formal system for continuing our education throughout our life in order to keep up with rapidly changing knowledge. When our education and job skills have grown obsolete, we are treated exactly like those who have never gained an education or job skills and are not encouraged or given the opportunity to begin anew.
As a society becomes more highly developed, the overall status of older people diminishes. Improved health technology creates a large pool of old people, who compete for jobs with the young. However, economic technology lowers the demand for workers and creates new jobs for which the skills of the aged are obsolete, forcing older people into retirement. At the same time, young people are being educated in the new technology and are keeping pace with rapid changes in knowledge. Finally, urbanization creates age-segregated neighborhood
A. learn new skills
B. be open-minded
C. have a good personality
D. keep pace with the times
