热门试题:
[单选题]从管理口登录服务器并使用start /SP/console进入操作系统控制台后，按（ ）键可退至服务器ILOM操作界面
A.Backspace
B.ESC
C.Ctrl+C
D.#.
[单选题]某市发生一起抢劫案，公安机关在侦查中确定了犯罪嫌疑人刘某，在对刘某的讯问中，刘某提出案发当日他一直在该市一个网吧和李某一起上网，没有作案时间。那么，如果李某作为证人，必须具备的条件是(
)。
A.不是刘某的近亲属
B.能够辨别是非、正确表达
C.身体没有缺陷
D.已成年
[多选题]接触网巡视检查有( )等。
A.步行巡视
B.乘车巡视
C.梯车巡视
D.抽查巡视
[单项选择]冷处是指（）
A. 1～30℃
B. 2～10℃
C. 不超过15℃
D. 不超过20℃
E. 自然温度
[单选题]依据热力机械安规，工作票的填写必须使用标准的术语，下列例子错误的是（）。
A.珲图甲线3901开关
B.220kV福剑线2731隔离开关
C.220kVⅡ组母线
D.500kVⅡ母，接地刀闸5227
E.lue
[判断题]商业汇票未按规定期限提示承兑的，持票人仍具备对前手的追索权。（）
[判断题]专责监护人可以兼做其他工作。
A.正确
B.错误
[单选题]《国家电网公司关于印发“深化基建队伍改革、强化施工安全管理”有关配套政策的通知》规定，“做实现场两级管理”是指做实施工单位作业现场管控和做实（）工程项目管理。
A.甲方
B.监理单位
C.设计单位
D.分包单位
[判断题]危险场所（地）、地段和重要设备、设施处，须设置醒目的安全警示标志。
A.正确
B.错误
[单选题]题干：根据《公路水路行业安全生产隐患治理暂行办法》规定，生产经营单位对发现或排查出的隐患，应当按照（ ），确定隐患等级，形成隐患清单。
A.隐患分级判定指南
B.隐患管控制度
C.隐患治理手册
D.隐患监督检查
[单选题]根据《烟草专卖法》第七条,纳入专卖管理范围的烟叶有( )和名晾晒烟。
A.晒烟
B.晾烟
C.烤烟
D.香料烟
[单项选择]从理论上来讲，热力对流云的云底高度在（）。
A. Zc（等熵凝结高度）
B. H（对流凝结高度）
C. B（自由对流高度）
D. E（对流上限）
[单项选择]水泥胶砂强度试件，脱模后在______的养护条件。
A. (20±1)℃的水中
B. 温度(20±1)℃，相对湿度＞90%
C. (20±2)℃的水中
D. 温度(20±1)℃，相对湿度＞95%
[判断题].个人在银行柜面开立的Ⅱ、Ⅲ类户,无需绑定Ⅰ类户或者信用卡账户进行身份验证
A.正确
B.错误
[单项选择]下列著作中，介绍美国民主制度及总统华盛顿并予以赞扬的是（）。
A. 《海国图志》
B. 《康輶纪行》
C. 《瀛环志略》
D. 《朔方备秘》
[单选题] "紫外吸收光谱是( )
A. 锐线光谱
B. 分子吸收光谱
C. 原子吸收光谱
D. 原子发射光谱"
[不定项选择题]对肠道内维生素K合成有重要作用
A.溶血性链球菌
B.金黄色葡萄球菌
C.大肠杆菌
D.真菌
E.类杆菌
[不定项选择题]共用题干
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 of soil by nest building activity and by collecting food they af-fect 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 Con-servation,said:“Ants are very effective predators which thrive in huge numbers. They're al-so 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 species which can be found across Europe,including in 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,showing that predation is 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 ecosystems 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.
Why are ants compared to ecosystem engineers?
A.Because they build their own nests.
B.Because they collect food.
C.Because their activity affects the environment.
D.Because they are predators.
[判断题]当电召台工作人员工作失误时，司机可以通过对讲机辱骂工作人员。
[判断题]生产现场和经常有人工作的场所应配备急救箱，存放急救用品，并应指定专人负责保管。
A.正确
B.错误
[多项选择]如果越过轴线拍摄，就叫做“跳轴”、“越轴”，可以实现合理越轴的方式有（）。
A. 移动摄影
B. 场面调度
C. 骑轴越轴
D. 全景交代
[单选题] 对于被刑事拘留的人，公安机关应当在拘留后（）内进行讯问
A. 12小时
B. 24小时
C. 36小时
D. 48小时
[单选题]挤压呼吸囊时,压力不可过大,约挤压呼吸囊的()为宜,以免损伤肺组织。( )
A.1/3-2/3
B.1/3-1/2
C.1/3-3/4
D.1/2-3/4
[单选题](467589)库仑计法水分测定仪在使用中碘生成量过大，不当的处理是( )。(1.0分)
A.更换阳极液
B.尽量保持室温稳定
C.使阴极液不受阳光直射
D.清洗阴极
[判断题]跨越架、操作人员、工器具与带电体之间的最小安全距离必须符合安规规定，施工人员严禁在跨越架外侧攀登或作业，严禁从封顶架上通过。（）
A.正确
B.错误
[单选题]进行分布式电源相关设备操作的人员应有与现场设备和运行方式相符的（），现场设备应具有明显操作指示，便于操作及检查确认。
A.设备接线图
B.保护接线图
C.现场模拟图
D.系统接线图
E.略
F.略
[单选题],关于痛经的描述正确的是
A.体内前列腺素分泌减少
B.冷敷局部
C.常发生在月经干净后1天内
D.镇痛剂有效
E.常无阳性体征
[填空题]Science textbooks and technical and professional journals are usually made up of several parts and contain various special features, many of which have a standard format. 【B1】 usually contain a large number of these parts; journals and 【B2】 contain many, but not all of them.
Knowing where to look for information and 【B3】 to expect in a book can greatly increase your ability to use all the information there. Explanations of and practice using some of these textbook parts and 【B4】 are covered in these even numbered lessons. The features in textbooks are 【B5】 into the following three categories. Front matter is the 【B6】 -numeral paginated section at the front of most books. The text is the main body of the book. The 【B7】 matter comprises the additional sections at the back of most books. 【B8】 our discussion of these three sections will deal mainly with textbooks, the practice provided will greatly 【B9】 your comprehension of scientific 【B10】 as well.
A. A．how
B．what
C．when
D．where
[多项选择]急性白血病的主要表现为（）
A. 组织器官浸润
B. 不同程度发热
C. 早期即可出血
D. 进行性贫血
E. 功能性呕吐
[单选题]属机械防松的装置是()。
A.双螺母防松
B.胶接防松
C.止动垫片防松
D.弹簧垫圈防松
[多选题]关于人民币定活两便储蓄存款，以下说法正确的是
A. 可部分提前支取
B.适合存款期限不确定的储户
C.存款期限不受限制
D.分段计息
[多项选择]下列选项中，符合公司的法律特征的是( )。
A. 依法设立
B. 以营利为目的的经济组织
C. 具有法人资格
D. 具有社团性
[单选题]在地面，如果只有电瓶为应急供电网络供电，只有飞机速度低于（）kt时才可以启动APU
A.100
B.80
C.60
[单项选择]水泥有效储存期为（）个月
A. 4个月
B. 3个月
C. 5个月
D. 2个月
[单选题] 消防员消防救援衔设 ()
A.三等八级
B.四等八级
C.三等九级
D.四等七级
[判断题]JXW25型25HZ相敏轨道电路电子接收器的轨道信号电压超前于局部电压理想相位角为90°
A.正确
B.错误
[单项选择]水密性检测时压力稳定作用时间为（）s，泄压时间不少于（）s.
A. 3，3
B. 3，1
C. 5，3
D. 5，1
