热门试题:
[单选题]吸收塔内不同截面处吸收速率( )。
A.基本相同
B.各不相同
C.完全相同
D.均为0
[单项选择]
Young girls at high risk for depression appear to have a malfunctioning reward system in their brains, a new study suggests. The finding comes from research that (1) a high-risk group of 13 girls, aged 10 to 14, who were not depressed but had mothers who (2) recurrent depression and a low-risk group of 13 girls with no (3) or family history of depression. Both groups were given MRI brain (4) while completing a task that could (5) either reward or punishment.
(6) with girls in the low-risk group, those in the high-risk group had (7) neural responses during both anticipation and receipt of the reward. (8) , the high-risk girls showed no (9) in an area of the brain called the dorsal anterior cingulated cortex (背侧前扣带皮质), believed to play a role in (10) past experiences to assist learning.
The high-risk girls did have greater activation of this brain area (11) receiving punishment,
A. Made
B. Regarded
C. Insisted
D. Compared
[单选题]下列调节离心式压缩机润滑油冷却器冷后油温的方法有( )。
A. 调节润滑油压力
B. 调节冷却器的冷却水量
C. 调节润滑油过滤器连通线
D. 调节冷却器入口压力
[单选题]( )的特征是具有稳定性、内在性、职业性、发展性。
A.职业道德素质
B.职业素质
C.职业能力
D.职业指导
[多选题]以下属于高级路面的有()
A. 沥青砼
B. 水泥砼
C. 热拌沥青碎石
D. SMA
E. 碎石砼
[单项选择]煤矿井下工人可引起（）。
A. 滑囊炎
B. 造血系统损害
C. 神经系统的损害
D. 呼吸系统损害
E. 泌尿系统损害
[多选题]巷道掘进是由（ ）等三大工序。
A.爆破
B.装运
C.支护
D.处理采空区
E.略
F.略
G.略
H.略
[单项选择]饮食卫生“五四制”要求用(食)具实行“四过关”，但不包括______。
A. 一洗
B. 二刷
C. 三冲
D. 四蒸
[多选题]雷德饱和蒸气压测定时,尤其需要注意的是( )。
A.压力表的校对
B. 温度控制
C. 检查泄漏
D.仪器的摇荡
[单选题]在环境化学污染物中，一次污染物是指
A.从污染源排入环境后，理化特性发生了变化的污染物
B.从污染源直接排入环境后，理化性质未发生变化的污染物
C.从污染源排入环境后，其毒性增大的污染物
D.多个污染物同时排出的同一类污染物
E.多种环境介质中都存在的同一类污染物
[填空题]某学校新建教学楼,内墙采用抹灰后刷涂料,外面装修为刷涂料局部采用饰面板。建成完工后,外墙涂料出现析白,另外发现部分墙面涂料有明显接槎。根据以上背景完成以下题目。室内外灰工程施工环境温度不应低于（ ） ℃。
[单项选择]心室肌的有效不应期较长，一直延续到（）
A. 收缩期开始
B. 收缩期中间
C. 舒张期开始
D. 舒张期结束
E. 舒张期结束以后
[单选题]《铁路旅客运输规程》中规定，其他旅客免费携带品的重量是（）。
A.A、15千克
B.B、20千克
C.C、25千克
D.D、30千克
[单项选择]开胸后患侧出现通气与血流比例异常应采取（）
A. 加强辅助呼吸
B. 患侧肺压缩
C. 保留自主呼吸
D. 双侧肺通气
E. 间歇性正压通气
[单项选择]甲企业为增值税小规模纳税人，2015年1月将企业生产过程中生产的边角废料销售，取得不含税销售收入10万元，另销售自己使用过的一台机器设备，取得含税销售额5.15万元。则甲企业上述行为应缴纳增值税（）万元。
A. 0.4
B. 0.56
C. 0.8
D. 0.42
[单选题]患者，男性，35岁，唇部及口腔内不明原因溃烂2周，疼痛剧烈，说话及进食困难，患者去年发生过类似疾病，检查：唇部糜烂、出血、结痂，舌背，口底及右颊部有大面积糜烂，覆黄色假膜，两手掌有圆或椭圆形红斑，该患者可能诊断为 ( )
A.药物性口炎
B.天疱疮
C.盘状红斑狼疮
D.多形渗出性红斑
E.糜烂型扁平苔藓
[单选题] 铝材料比铜材料的导电性能（）。
A. 好
B. 差
C. 一样
D. 稍好
[单项选择]冠状动脉粥样硬化的早期病理改变为（）
A. 冠状动脉狭窄
B. 冠状动脉阻塞
C. 冠状动脉内膜黄色脂纹
D. 心肌缺血坏死
E. 冠状动脉侧支循环建立
[判断题]汇流箱安装前，应先对其内部元件做绝缘测试。
A.正确
B.错误
[单选题]作业高度在 时，称为四级高处作业
A.2m≤h≤5m
B.5m＜h≤15m
C.l5m＜h≤30m
D.h > 30m以上
[单选题]额定起重量大于或者等于（）t（或额定起重力矩大于或者等于40t·m的塔式起重机，或生产率大于或者等于300t/h的装卸桥），且提升高度大于或者等于2m的起重机。
A.2
B.3
C.4
D.5
[单项选择]下面关于加密的说法中，错误的是（）
A. 数据加密的目的是保护数据的机密性
B. 加密过程是利用密钥和加密算法将明文转换成密文的过程
C. 选择密钥和加密算法的原则是保证密文不可能被破解
D. 加密技术通常分为非对称加密技术和对称密钥加密技术
[单项选择]下列选项可用阴阳对立制约解释的是（）。
A. 寒极生热
B. 阴损及阳
C. 寒者热之
D. 重阴必阳
E. 阴中求阳
[单选题].高处作业应搭设脚手架、使用高空作业车、升降平台或采取其他防止坠落的措施。
A.正确
B.错误
[多选题]磁翻板和磁浮子液位计的安装应符合下列要求( )。( )
A.磁翻板液位计应垂直安装。磁翻板液位计与容器引管间应装设截断阀。
B.磁翻板液位计本体周围不应与导磁物质接近,不应用铁质材料固定。
C.磁翻板液位计的安装位置,应避开或远离物料介质进出口处。
D.磁浮子液位计测量管内不应有焊渣、导磁性物质及其他杂物存在。
[单选题]高铁全电缆10kV贯通线，供电可靠性较高，发生瞬间接地故障的概率较低，接地系统按（ ）方式设计。
A.高电阻
B.低电阻
C.大电流
D.小电流
[多选题]为保障煤矿安全生产和从业人员的人身安全与健康，防止煤矿事故与职业病危害，根据（）.《煤矿安全监察条例》和《安全生产许可证条例》等，制定本规程。
A.《煤炭法》
B.《矿山安全法》
C.《安全生产法》
D.《职业病防治法》
[多项选择]造成医院内感染的主要因素
A. 医务人员对医院内感染的严重性认识不足
B. 有严格的监测制度、管理制度
C. 医院内存在感染源、传播途径和易感宿主
D. 抗生素大量使用易使细菌产生耐药性
E. 消毒灭菌不严格，无菌技术操作不当
[多选题]进入作业现场应正确佩戴安全帽，现场作业人员还应穿（）、（），
A.棉长袖工作服，
B.绝缘服，
C.绝缘鞋，
D.绝缘靴，
[多选题]按《设备设施报修规定》中规定，下列哪些故障属于一类故障。（）
A.电梯困人
B.车站照明系统公共区照明大面积失电
C.安检设备故障
D.服务热线话务系统故障
[单选题]房屋买卖中契税的纳税时间是在（ ）之前。
A.商定成交价格
B.签订房屋买卖合同
C.交付购房首付款
D.办理房屋权属证书
[单选题]理财规划师需要分析客户面临的财产损失风险，其中，不动产主要面临的风险不包括()。
A.火灾
B.爆炸
C.盗窃
D.自然灾害
[单项选择]一足月儿，生后喂奶即出现呛咳及呕吐，X胸片示两肺不张，腹部平片示胃无气体。最可能的诊断为（）
A. 膈疝
B. 十二指肠闭锁
C. 食管闭锁
D. 食管裂孔疝
E. 双侧后鼻孔闭锁
[多选题]下列属于公务员内部行政纪律责任的惩戒措施的有:
A.批评教育
B.责令作出书面检查
C.通报批评
D.降级
E.责令待岗
[单项选择]下面哪些硬件操作会影响业务（）
A. 拔插OSC单板
B. 拔插NCP单板
C. 拔插OLA单板
D. 硬复位OTU单板
[不定项选择题]When researchers first discovered a link in the late 1990s between childhood adversity and chronic health problem later in life, the real revelation was how common those experiences were across all socioeconomic groups. But the first major study to focus on adverse childhood experiences (ACEs) was limited to a single healthcare system in San Diego. A study published in JAMA Pediatrics- the largest nationally representative study to date on ACEs一confirms that these experiences are universal, yet highlights some disparities among socioeconomic groups.
The current study finds three out of five adults across the U.S. had at least one adverse experience in their childhood, such as divorce, a parent's death, physical or emotional abuse, or a family member's incarceration or substance abuse problem. A quarter of adults have at least three such experiences in childhood, which according to other research- increase their risk for most common chronic diseases, from heart disease and cancer to depression and substance abuse.
"This is the first study of this kind that alows us to talk about adverse childhood experience as a public health problem in the same way we talk about obesity or hypertension or any other highly prevalent population risk factor" says Adam Schickedanz, an assistant professor of pediatrics at the David Geffen School of Medicine at UCLA, who was not involved in the research. "Up until now,we haven't really had a study that takes a national look .
The study researchers, led by Centers for Disease Control and Prevention researcher Melissa T. Merrick, analyzed data from 214, 157 adults in 23 states recently. The participants answered 11 questions about whether they'd experienced what have now become well recognized as ACEs: parental separation or divorce, child abuse (physical, emotional and sexual ), domestic violence and living with someone who has been incarcerated or has a mental ilness or a substance use disorder.Nearly 62 percent of respondents had at least one ACE and a quarter reported three or more. The remaining respondents had at least two ACES, including 16 percent with four or more such experiences .Those identifying as black or Latino and those with less than a high school education or an annual income below $15,000 were more likely to have more ACES. Women, younger adults,unemployed people and those unable to work also tended to have more ACES. But Schickedant cautions that, while the disparities are real, it's important to recognize how common these experiences are among all people, including white and middle class families.”This study shows that ACEs affect people from all walks of life everywhere," he says.
This new study suggests that a need to target prevention resources where they can help most,says Jack Shonkoff, a professor of child health and development at the Harvard T.
H. Chan School of Public Health. This requires identifying what makes some people more susceptible than others to the effects of adversity,“Nobody is immune to adverse experiences in childhood but for some population groups, they're a larger burden of childhood adversity than others." he says.
What will most probably be done according to the current study?
A.Identifying the group of people who are at greatest risk.
B.Exploring the social and biological mechanisms behind.
C.Developing programs that can reduce or mitigate adversity.
D.Teaching children how to deal with adversity in a healthy way
[单选题]（ ）是车轮沿踏面周围的厚度部分。
A.轮毂
B.踏面
C.轮缘
D.轮辋
[单项选择]女性，30岁，背部肿块，红、肿、疼痛3d，寒战，体温39℃。查体：背部肿起约 3cm×5cm，触之有波动感，给予局部引流和全身应用抗生素后，仍有寒战、高热，最合适的治疗措施是
A. 局部再次清创扩大引流
B. 局部理疗
C. 寻找有无其他感染病灶
D. 使用抗真菌药物治疗
E. 加用肾上腺皮质激素
