热门试题:
[单选题]依据《中国南方电网有限责任公司安全管理规定》,各单位在电力建设、技改大修和其他生产经营项目外委发包前,必须对承包商资质进行审查,通过后方能与其发包,且必须依法与承包商签订()。
反馈
A.安全生产责任书
B.承包合同
C.安全生产管理协议
D.现场勘察手续
[单选题]驾驶机动车在没有道路中心线的狭窄山路怎样会车?
A.不靠山体的一方先行
B.靠山体的一方先行
C.重车让空车先行
D.速度慢的先行
[不定项选择题]共用题干
Geology and Health
1. The importance of particular metals in the human diet has been realized within the past few decades,and the idea that geology might be related to health has been recognized for a number of elements such as iodine,zinc and selenium. For example,soils with low iodine contents produce crops,and animals deficient in iodine.A lack of iodine in the human diet leads to some serious diseases.
2.The ultimate source of metals within the human body is rocks,which weather into soil.gaining or losing some of their chemical constituents. The crops we eat selectively remove from the soil the elements that they require for growth .The water we drink contains trace elements leached from rock and soil. Thus the geology and geochemistry of the environments have effects on the chemis-try and health of plants,animals and people.
3. So far there is no data to suggest that people living on metal-rich soils experience a potential health hazard. The levels of metals within naturally contaminated soils are generally not high enough to cause serious health problems.Living on metal-rich soils does not represent a health risk unless large quantities of soil are digested or metal-rich dust is inhaled.However,small chil-dren are particularly exposed to metal-rich topsoil in playgrounds and gardens. They are also the most likely ones to eat potentially dangerous metal-rich soil.
4. Heavy metals are persistent:they do not break down to other chemicals in the environment. Industrially polluted sites usually undergo intensive clean-up and rehabilitation because heavy metals are a health concern once they enter the food chain. Some trace metals are alleged to cause cancer and are also known to cause poisoning.
5.In contrast,naturally contaminated soils have not been subject to risk assessment studies and rehabilitation measures,despite the fact that they frequently possess metal concentrations well above those of such polluted by humans and above environmental quality criteria.
6.There is a vital need to understand the potential risks and long-term health effects of living on naturally contaminated soils.Future environmental investigations of naturally polluted soils should concentrate on the potential pathways of metals into the food chain and human body.Geologists should be part of such studies as they can provide the essential background information on rock and soil chemistry as well as the chemical forms of heavy metal pollution.
Geologists are indispensable in the research project on geology and health due to their knowledge on_______.
A.industrially polluted soils
B.rock and soil chemistry
C.naturally polluted soils
D.the pathways of metals into the food chain
E.the element of iodine
F.the persistence of heavy metals
[填空题]利用着火时的温度探测火灾的传感器称为()。
[单选题]根据上述表现,判断此病人可能出现了哪种情况( )
A.发热反应
B.过敏反应
C.心脏负荷过重的反应
D.空气栓塞
[判断题]判断题
为防止直接雷击电力设备,一般多采用避雷针和避雷线。
正确
错误
A.正确
B.错误
[判断题]经本单位批准允许单独巡视高压设备的人员巡视高压设备时,如果确因工作需要,可临时移开或越过遮栏,事后应立即恢复。
A.正确
B.错误
[简答题]HXD3电力机车运行中发生牵引变流器故障不能自行恢复时,司机如何做?
[多项选择]从以人为本的思想出发,要求在社会评价中将人的因素放在中心位置予以考虑,特别是要重点关注以下弱势群体:( )。
A. 贫困人口
B. 女性
C. 少数民族
D. 非自愿移民
E. 少年儿童
[单选题]当线路出现( )处轨缝大于构造轨缝时,应对轨缝进行调整。
A.1
B.2
C.3
D.4
[单项选择]任务栏的通知区域不包括()
A. “关机”按钮
B. 系统时钟
C. 音量
D. 网络和共享中心
[判断题](32)实际塔板数N实与理论塔板数N理之比,称为板效率。( )
A.正确
B.错误
[单选题]为防止树木(树枝)倒落在线路上,应使用绝缘绳索将其拉向与线路( )的方向,绳索应有足够的长度和强度,以免拉绳的人员被倒落的树木砸伤。
A.相反
B.60°
C.90°
D.相同
[判断题]任何公民享有宪法和法律规定的权利,并选择履行宪法和法律规定的义务。
正确 错误
A.正确
B.错误
[单选题]焊后消除应力热处理可以提高钢材的强度。()
A.正确
B.错误
[单选题]对林奶奶的饮食指导,正确的是( )
A.适量蛋白
B.多吃高纤维
C.少吃水果
D.高脂饮食
E.可吃辛辣食品
[单选题]肝外胆道不包括
A.肝左、右管
B.肝总管
C.胆囊
D.胰管
E.胆总管
[单项选择]子宫肌瘤出现剧烈腹痛常见的原因是()
A. 黏膜下肌瘤刺激子宫收缩
B. 肌瘤迅速生长
C. 肌瘤压迫膀胱或直肠
D. 肌瘤恶变
E. 肌瘤红色变性
[单选题][单选][常识]生产经营单位必须依法参加( ),为从业人员缴纳保险费。【单项选择例题】
A. 失业保险
B. 意外保险
C. 工伤保险
D. 医疗保险
[单项选择]某建设项目的静态投资为3750万元,指进度计划,项目建设期为两年。两年的投资分年使用,比率为第一年40%,第二年60%,建设期内平均价格预测为6%,则该项目建设期的涨价预备费为( )。
A. 368.1万元
B. 360万元
C. 267.5万元
D. 370万元
[判断题]配送基本服务要求配送系统具备一定的基本能力,这种能力是配送主体向用户承诺的基础,也是用户选择配送主体的依据。()
[判断题]一级负荷在任何情况下都不允许停电,所以应采用双电源供电或单电源双回路供电。
A.正确
B.错误
[多选题]采空区处理方法有( )种。
A.缓慢下沉法
B.全部垮落法
C.充填法
D.刀柱法
[多选题]世界正处于大发展大变革大调整时期,和平与发展仍然是时代主题。()深入发展。
A.世界多极化
B.经济全球化
C.社会信息化
D.文化多样化
E.治理民主化
[单项选择]甲状腺术后最危急的并发症是
A. 甲状腺危象
B. 手足抽搐
C. 喉返神经损伤
D. 喉上神经损伤
E. 术后呼吸困难和窒息
[单项选择]最能体现教育的生活化、情感化、多样化特点的是()。
A. 学校教育
B. 社会教育
C. 家庭教育
D. 社区教育
[单项选择]谈判双方的座次位置安排,应充分体现主宾之别。若谈判界域条件允许,按照我国的传统文化应让客方坐在()以使对方有被尊重之感,增强谈判中的友好气氛。如果谈判是在异地举行,则应尊重当地风俗和主人。
A. 左侧或南侧
B. 左侧或北侧
C. 东侧或右侧
D. 东侧或左侧
[多选题]在ATO模式下,TCMS从ATC系统接收( )等信号,并通过网络转发给列车广播系统。
A.起始站
B.报站触发
C.下一站开门侧
D.越站
E.终点站
[单选题]太阳能光伏电池,阳光照射在半导体上时,()产生电流,阳光强度越大,电流就越强。
A.正极
B.负极
C.两极交界处
D.两极绝缘处
[判断题]相对编号法,基本原则为甲中有乙,乙中又有甲。( )
A.正确
B.错误
[判断题]交通安全设施每标段为一单位工程。()
A.正确
B.错误
[单选题]辅助风缸排风阀为()。
A.U02.001
B.U02.002
C.U02.003
D.U02.004
[单选题]CR400AF动车组动车轮对更换中,转向架撒砂装置安装质检员使用扭矩扳手按照规定力矩的 ( )复核螺栓紧固到位。
A.70%
B.80%
C.90%
D.100%
[单项选择]That was so serious a matter that I had no choice but _______ the police.
A. called in
B. calling in
C. call in
D. to call in
[单项选择]医患关系遵循的最重要的道德原则是()
A. 医患平等关系
B. 医患团结关系
C. 医患互助关系
D. 医患友爱关系
E. 医患对立关系
[单项选择]心理咨询师边听求助者诉说,边点头表示理解而且鼓励其说下去,这在心理咨询技能中属于()。
A. 封闭式询问技术
B. 鼓励与重复技术
C. 倾听技术
D. 通情达理技术
[单项选择]分流器的拆除方式为()。
A. 一次性拆除
B. 分二次拆除
C. 分三次拆除
D. 分四次拆除