热门试题:
[单项选择]肺性脑病不能用高浓度吸氧主要是因为（）
A. 缺氧不是主要因素
B. 引起氧中毒
C. 解除了颈动脉窦的兴奋性
D. 促使二氧化碳排出过快
E. 诱发代谢性碱中毒
[单选题]体现间接经验与直接经验相统一规律的教学原则是( )
A.直观性原则
B.理论联系实际原则
C.因材施教原则
D.量力性原则
[单选题]爱国主义是调节个人和祖国之间关系的道德要求、政治原则和( )
A.内心信念
B.法律规范
C.自觉行为
D.传统美德
[填空题]LFA31360变流器可以调节通过转子侧的励磁电流，控制风力发电机的（ ），增加主动 Crowbar和相应的泄流电阻回路后具备（ ）能力。
[单选题]有人这样比喻政府机构中的分工和职责：蝗虫飞在天上，农业部门要管；落在树上，林业部门要管；趴在草丛里，畜牧部门要管；飞到公园，城建部门要管。针对多头管理造成管理成本加大、人力资源浪费的现象，政府机构改革应该()。
A.坚持依法治国，建设法治型政府
B.科学划分职能，提高行政管理效率
C.强化政府职责，推行行政问责制
D.遵循运行程序，实现科学决策目标
[单选题]循环压井平稳要求基值( )倍以上，且绝对值达到0.2%以上，钻井液性能及池体积无明显变化这种现象。
A.0.5
B.1
C.2
D.3
[单项选择]某年，电信公司投入了巨资改善网络通讯质量和网络覆盖区，结果当年用户增加了20%，但是利润却下降了10%。
以下选项中最可能解释上述情况发生的原因是( )。
A. 新增用户的消费总额较低
B. 网络包年费大幅度降低
C. 电信公司当年的管理出了问题
D. 电信公司为扩大网络覆盖区投入的资金过多
[不定项选择](一)
某市有100万户家庭，平均每户3人。若该市人均年收入为40 000元，户均住房消费支出占每户年收入的30%，房价收入比为6。
如果该市住房平均建筑面积为80 ㎡，依据该市情况可测算出其住房平均单价为（ ）元/㎡。
A. 900
B. 2 700
C. 3 000
D. 9 000
[判断题]消防救援机构消防监督检查中发现城乡消防安全布局、公共消防设施不符合消防安全要求,或者发现本地区存在影响公共安全的重大火灾隐患的,应当由公安机关书面报告本级人民政府。
A.正确
B.错误
[多选题]工作许可人应具备的基本条件的有( )。
A.熟悉配电网络接线方式
B.熟悉工作范围内的设备情况
C.熟悉国家电网公司电力安全工作规程(配电部分)(试行)
D.经工区批准的人员担任,名单应公布。
[填空题]PTH的合成与分泌受( ) 浓度的负反馈调节。
[单选题]兆欧表[标有（ ）]俗称摇表，是一种高电阻表，专门用来检测和测量电气设备和供电线路的绝缘电阻。
A.MA
B.MY
C.M?
D.MN
[单项选择]
Passage Four Almost every family buys at least one copy of a newspaper every day, Some people subscribe to as many as two or three different newspapers. But why do people read newspapers Five hundred years ago, news of important happenings--battles lost and won, kings or rulers overthrown or killed--took months and even years to travel from one country to another. The news passed by word of mouth and was never accurate. Today we can read in our newspapers of important e vents that occur in faraway countries on the same day they happen. Apart from supplying news from all over the world, newspapers give us a lot of other useful in formation. There are weather reports, radio, television and film guides, book reviews, stories, and, of course, advertisements. There are all sorts of advertisements. The bigger ones are put in by large companies to bring attention to their products. They pay the newspapers thousands of dollars for their advertising space, but it is worth the money
A. widespread
B. found among a few families
C. not popular
D. uncommon
[单项选择]苏联解体后，《真理报》的性质改变为（）
A. 俄罗斯共产党机关报
B. 民营独立报纸
C. 俄国政府的报纸
D. 外国资本控制的报纸
[多选题] 悬式绝缘子串的组装形式有()。
A. 单串悬垂。
B. 双串悬垂。
C. 多串悬垂
D. V型悬垂。
E. U型悬垂。
[单选题]有关航空器识别标志的规定，可在下列哪一部中国民用航空规章（CCAR）中找到。
A.CCAR-21
B.CCAR-39
C.CCAR-45
D.CCAR-25
[单项选择]低渗性脱水治疗时应静脉补充（）。
A. 5%葡萄糖水
B. 0.9%生理盐水
C. 5%生理盐水
D. 等量5%葡萄糖水＋0.9%生理盐水
[单项选择]在胸片上可见肺部大血管周围呈串珠样透亮区，此外，在纵隔处还有一透亮区并伴有皮下气肿，这种检查结果可见于（）
A. 大疱性肺气肿
B. 阻塞性肺气肿
C. 瘢痕性肺气肿
D. 间质性肺气肿
E. 肺梗死
[不定项选择题]共用题干
Just one hour's listening to an MP3 player can damage hearing,claim scientists.It causes temporary changes in hearing sensitivity which may lead to long-term harm,according to a new study.
The findings show over -stimulation of hair cells within the ear occurs even at varying volume levels for short periods of time.The study of almost 60 young people carried out by researchers at Ghent University,Belgium,is published in the Archives of Otolaryngology -Head&Neck Surgery journal.
It follows previous warnings from doctors that using MP3 players at high volumes with earphones that fit into the ear canal could lead to loss of hearing. In the latest study,21 people aged 19 to 28 years were exposed to pop and rock music using MP3 players at varying volumes for one hour. A second group of 28 men and women were a control group who were not exposed to MP3 music.
Hearing tests were carried out before and after the exposure,which found significant threshold or emission shifts were observed between almost every session of the noise exposure group compared with the control group.Lead researcher Hannah Kempler said:Excessive noise exposure can lead to metabolic and mechanical effects resulting in alterations of the structural elements of the inner ear that contains auditory sensory cells or"hair cells".
The European Commission has warned up to 10% of 30-year-old would have to wear a hearing device within the next decade because they listen to music too loudly through headphones.Surveys showed more than 90% of young people in Europe and the U.S.used MP3 players,often for several hours a day at maximum volume.Hearing experts recommend the 60/60 rule一listening to MP3 players for no more than 60 minutes at a time at 60% of maximum volume.Concern among EU health and safety officials has led to plan to ensure all MP3 players have the same maximum volume of 85 decibels(d
B)一although users may be able to individually override it at their own risk.
Not much difference was found between the exposure group and the control group according to the hearing tests after the exposure.
A.Right
B.Wrong
C.Not mentioned
[单项选择]一年轻已婚女性。术中见左侧卵巢肿瘤拳头大小，包膜完整，实质性，左侧卵巢剖视正常，腹腔冲洗液中未发现肿瘤细胞。冷冻切片示左卵巢颗粒细胞瘤。处理宜为（）
A. 子宫全切除术+双附件切除术
B. 左侧附件切除术，术后密切随访
C. 左侧肿瘤切除术+子宫切除术，术后密切随访
D. 左侧附件切除术+大网膜切除术
E. 子宫全切除术+左侧附件切除术，术后化疗
[单选题]生物群落和环境之间构成的综合体是( )。
A.生产力系统
B.生物系统
C.生态系统
D.生物圈
[判断题]依据《评标委员会和评标方法暂行规定》(七部委12号令），招标人在某次招标投标活动中确定了某施工单位为中标人，不必将中标结果通知未中标人，但须退还未中标人的投标保证金。
A.正确
B.错误
[判断题]动车组列车驾驶室与旅客乘坐席间的门须锁闭。
A.正确
B.错误
[多选题]液压系统中蓄能器按其储能方式不同可分为（ ）。
A.重锤式
B.弹簧式
C.气体式
D.液压式
[判断题]甲，17周岁，将派出所民警乙的儿子打致轻伤，乙侦办此案。甲及其父母有权要求乙回避。（）
A.正确
B.错误
[单选题]下列制动跑偏的原因中不包括( )。
A.制动踏板损坏
B.有一侧钢板弹簧错位或折断
C.转向桥或车架变形,左右轴距相差过大
[判断题]雷电、暴雨雪来临时,应停止爆破作业,所有人员应立即撤到安全地点。( )
A.正确
B.错误
[单项选择]企业产品定价以（）为最低界限。
A. 成本
B. 需求
C. 市场
D. 生产
[判断题]申请重组贷款金额可以大于贷款链借据余额。
A.正确
B.错误
[判断题] 血小板释放的5-羟色胺及儿茶酚胺等生物活性物质，有利于止血。 （ ）
A.正确
B.错误
[单项选择]零件表面光滑使（）。
A. 配合的接触面积减小
B. 零件寿命提高
C. 表面易磨损
D. 单位面积压力增大
[单选题]个人保安线应在杆塔上接触或接近导线的（）挂接，作业结束脱离导线后拆除。
A.A.作业开始前
B.B.作业时
C.C.开工前
D.D.许可工作前
[单选题]《铁路客运运价规则》规定，旅客可凭客票办理（ ）行李托运。
A.1次
B.2次
C.3次
D.多次
[简答题]在发现直接危及（）和（）安全的紧急情况时，有权停止作业或者在采取可能的（）后撤离作业场所，并立即报告。
