热门试题:
[简答题]根据《GB501069-2006》要求,接至电气设备上的接地线,应用()连接
[多项选择]统计患者的入液量时应包括()。
A. 饮水量
B. 输液量
C. 食物中含水量
D. 输血量
E. 鼻饲量
[单项选择]国务院和地方各级人民政府鼓励和支持城市学校教师和高等学校毕业生到( )从事义务教育工作。
A. 农村地区
B. 民族地区
C. 农村地区、民族地区
D. 经济不发达地区
[判断题]合金钢轧后冷却出现的裂纹是由于金属内部的残余应力和热应力造成的。 ( )
A.正确
B.错误
[单选题]检查工作票所列安全措施是否正确完备,是否符合现场实际条件,必要时予以补充完善是()的安全责任。
A.工作票签发人
B.工作许可人
C.工作负责人(监护人)
D.专责监护人
[单选题]单管塔施工安装前应进行(),以保证对施工场地的要求。
A.安全预想
B.人员教育
C.现场勘察
D.施工布置
[单项选择]下列涎腺肿瘤中不含肌上皮细胞的是()。
A. 多形性腺瘤
B. 肌上皮瘤
C. 腺样囊性癌
D. 黏液表皮样癌
E. 多形性低恶度腺癌
[单选题]督察人员在督察工作中,不属于必须遵循的原则是()。
A. 现场督察
B. 实事求是
C. 依法办事
D. 接受监督
[判断题]人力推车式,人员必须在两侧推车。(( ))
A.正确
B.错误
[判断题]对于正在运转中的机器,不准装卸和校正皮带,但可直接用手往皮带上撒松香等物。
A.正确
B.错误
[判断题]炼油厂火灾扑救中冷却高温部位应选用直流水流,并保持均匀,不留空白点,防止装置和设备变形,以及高温部位骤冷爆裂。( )
A.正确
B.错误
[单选题]( )电缆主绝缘应开展交流耐压试验,并应同时开展局部放电测量。
A.110(66)千伏及以上
B.220kV及以上
C.500kV
D.110kV
[多选题]着力服务“一带一路”建设,要充分发挥公司综合优势,遵循(____)原则,加快“走出去”步伐。
A.共商$
B.$共建$
C.$共享$
D.$平等互利
[不定项选择题]共用题干
第二篇
Ants Have Big Impact on Environment as "Ecosystem Engineers"
Research by the University of Exeter has revealed that ants have a big impact on their local environment
as a result of their activity as"ecosystem engineers"and predators.The study,published in the Journal of
Animal Ecology,found that ants have two distinct effects on their local environment.
Firstly,through moving the soil by nest building activity and by collecting food they affect the level of
nutrients in the soil.This can indirectly impact the local populations of many animal groups,from decomposers
to species much higher up the food chain.
Secondly,they prey on a wide range of other animals,including larger prey which can be attacked by
vast numbers of ant workers.
Dirk Sanders,an author of the study from the university's Centre for Ecology and Conservation,said,
"Ants are very effective predators which thrive in huge numbers.They're also very territorial and very
aggressive,defending their resources and territory against other predators.All of this means they have a strong
influence on their surrounding area."
"In this research,we studied for the first time how big this impact is and the subtleties of it.What we
found is that despite being predators,their presence can also lead to an increase in density and diversity of
other animal groups.They genuinely play a key role in the local environment,having a big influence on the
grassland food web,"Sanders said.
The study,carried out in Germany,studied the impact of the presence of different combinations and
densities of black garden ants and common red ants,both of which can be found across Europe,including the
UK. It found that a low density of ants in an area increased the diversity and density of other animals in the
local area,particularly the density of herbivores and decomposers.At higher densities ants had no or the
opposite effect,the predation counteracting the positive influence.
Dr Frank van Veen,another author on the study,said:"What we find is that the impact of ants on soil
nutrient levels has a positive effect on animal groups at low levels,but as the number of ants increases,their
predatory impacts have the bigger effect一thereby counteracting the positive influence via ecosystem engineering."
Ants are important components of the ecosystem not only because they constitute a great part of the
animal biomass but also because they act as ecosystem engineers.Ant biodiversity is incredibly high,and
these organisms are highly responsive to human impact,which obviously reduces its richness.However,it is
not clear how such disturbance damages the maintenance of ant services to the ecosystem.Ants are important
in below ground processes through the alteration of the physical and chemical environment and through their
effects on plants,microorganisms,and other soil organisms.
What does Paragraph 6 tell us?
A.Ants bring about a negative influence to an area when their population is small.
B.Ants bring about a positive influence to an area when their population is small.
C.Ants' predation counteracts the positive influence they may have on an area.
D.At higher density,ants produce a positive influence on an area.
[单选题]属分期还本付息的消费类信贷业务,应根据逾期情况进行催收。连续逾期2期的,信贷人员应在个( )工作日内通过电话向借款人催收,并做好电话记录。
A.20
B.15
C.10
D.5
[单选题]下列不是下腔静脉属支的为( )
A.髂总静脉
B.肾静脉
C.腰静脉
D.肝静脉
E.门静脉
[多选题]矿油封藏法的保藏策略是
A. 低温
B. 干燥
C. 缺氧
D. 无营养物
[单选题]PPR 25变20外丝弯头 单位 个 批发价( )
A.3.00
B.7.0
[单选题]101-128车司机室侧门净开宽度和净开高度分别为( )。
A.520mm,1820mm
B.520mm,1860mm
C.560mm,1820mm
D.560mm,1860mm
[单选题]乙公司2×19年度归属于普通股股东的净利润为712.8万元,发行在外普通股加权平均数为120万股,该普通股平均市场价格为6元。2×19年年初,乙公司对外发行96万份认股权证,行权日为2×20年3月1日,每份认股权证可以在行权日以3元的价格认购本公司1股新发的股份。 乙公司的稀释每股收益为( )。
A.4.36元/股
B.5.51元/股
C.4.54元/股
D.4.24元/股
[单选题] 人民警察当场收缴罚款,不出具统一制发的罚款收据的,被处罚人有权()
A. 拒绝执行处罚
B. 提出暂缓执行处罚
C. 提出暂缓缴纳罚款
D. 拒绝缴纳罚款
[单项选择]机械性肠梗阻病人,当腹部X线检查显示下列哪种变化时,应考虑绞窄性肠梗阻的可能()。
A. 近段肠管扩张,远端肠管未见气体
B. 扩张肠段呈阶梯型排列
C. 孤立性肠段扩张且较固定
D. 有气液平面
E. 大小肠均胀气
[单项选择]学生装、中式服装多采用领型,其纹样形式多以()为主。
A. 秃领、二方连续纹样
B. 趴领、角隅纹样
C. 立领、二方连续
D. 秃领、四方连续纹样
[多选题]火场照明的作用()
A.便于人员疏散
B.稳定人员情绪
C.传递相关信息
D.便于展开行动、
E.增加安全系数
[单选题]消防救生气垫应尽可能远离火源,四角( )。
A.固定在某处
B.对角应固定在一条直线
C.把持人员应随着气垫上下波动收放绳索
D.把持人员应牢牢抓住绳索
[单选题]社区健康教育的对象不包括( )。
A.健康人群
B.慢性疾病病人
C.病人家属
D.临终病人
E.住院病人
[判断题]各级单位应当严格按照车辆编配用途、性能和规定的动用数量、行驶区域使用,按照规定组织车辆初驶、 封存、启封、保养和检查,准确掌握车辆的动用、数量、质量、 车公里消耗和维护保养等动态情况。( )
A.正确
B.错误
[单选题]BD010 注汽管线过路有护管,护管掩埋低于路面,两端安装醒目的( )警示牌。
A.“小心淹溺”
B.“小心有电”
C.“高温高压”
D.“禁止合闸”
[判断题]抑郁的人最大的特点就是绝望,觉得行为没有结果。
A.正确
B.错误
[多项选择]安全生产法制不健全的突出表现为( )。
A. 法律意识淡薄
B. 出现新情况、新问题,亟待依法规范
C. 综合性的安全立法滞后
D. 领导重视不够
E. 没有依法监管的长效机制
[单选题]头部发生创伤的人员,在接受医生检查前,采取下列急救措施中,()是不正确的。
A.尽量减少不必要的活动
B.给伤者服止痛片止痛
C.运送途中应把伤者的头转向一侧,便于清除呕吐物
[单项选择]采场底部集中排水适用于()。
A. 汇水面积小的中小型矿山
B. 山坡露天矿
C. 汇水面积大采深大的矿山
[单项选择]浇注铸件时,为了便于冒口对铸件下部金属的补缩而在零件上部多加的一锥形金属层,称为()。
A. 补缩余量
B. 工艺筋
C. 工艺余量
D. 工艺补正量
[单项选择]The "1000" in 1000BaseT cabling represents which of the following?()
A. The theoretical maximum cable length
B. The theoretical maximum bandwidth
C. The theoretical port limit of the cable
D. The quality level of the copper wiring used
[单选题]根据室间隔缺损的血液动力学改变,首先引起增大的心腔是:
A.右心室增大
B.右心房增大
C.肺动脉扩张
D.左心室增大
E.左心房增大
[单选题]在进行可靠性鉴定试验时,投入试验的产品数一般在( )个以上。
A.2 ~3
B.5 ~6
C.7 ~8
D.9-10
[单项选择]下列哪项不是恶性肿瘤患者止痛给药的主要原则是()。
A. 口服给药
B. 疼痛发作时给药
C. 按阶梯给药
D. 用药个体化
[单选题]金属的防腐蚀问题,可以从以下下几个方面考虑,其中哪项除外
A.使合金的组织结构均匀
B.避免不同金属的接触
C.经冷加工后的应力需要通过热处理减小或消除
D.经热加工后的应力需要冷处理
E.修复体的表面保持光洁无缺陷