热门试题:
[判断题]抢险救援预案中危害特性主要包括:人员造成危害的可能性;建筑物及环境造成破坏的可能性;抢险救援行动影响的可能性( )
A.正确
B.错误
[单选题] 轨道电路有调整状态,()状态,断轨状态三种。
A. 开路
B. 短路
C. 断路
D. 分路
[单项选择]保留2年()
A. 处方
B. 麻醉药品处方
C. 医疗用毒性药品、精神药品及戒毒药品处方
D. 普通处方、急诊处方、儿科处方
E. 中药饮片处方
[判断题](48941)( )车辆部门的干部添乘检查客车运用工作时,应使用铁道部或铁路局填发的客车添乘证。
A.正确
B.错误
[判断题]高处作业危及人身安全时,必须停止作业。( )
A.正确
B.错误
[单选题]城乡居民基本养老保险制度自2014年建立以来,一共( )次提高基础养老金最低标准。
A.2
B.3
C.4
D.5
[判断题]在三相对称故障时,电流互感器的二次计算负载,三角形接线比星形接线大3倍。
A.正确
B.错误
[多选题]用人单位要从 等方面对辅警强化实施监督管理。( )
A.日常考勤
B.助人为乐
C.警容风纪
D.履职尽责
[多项选择]我国目前的增值税率的档次包括( )。
A. 6%
B. 13%
C. 17%
D. 18%
E. 27%
[单项选择]t-PA属于下列何种药物
A. 抗血小板药
B. 纤维蛋白溶解药
C. 抗贫血药
D. 促白细胞增生药
E. 血容量扩充剂
[单选题]走收电费主要是指收费人员赴( )收取电费。
A.居委会
B.街道办事处
C.用户处
D.银行
[单项选择]骨折愈合期关节活动度训练中,"非受累关节进行各运动轴方向的运动,轻柔牵伸挛缩、粘连的组织"属于()。
A. 主动运动
B. 被动运动
C. 助力运动
D. 牵张训练
E. 关节松动术
[单选题]涡轮蜗杆传动( )。
A.必须是涡杆带动涡轮旋转
B.必须是涡轮带动蜗杆旋转
C.涡轮的齿形与梯形螺纹相同
D.效率比齿轮传动的要高
[单项选择]关于钢材的可焊性,说法错误的是( )。
A. 钢材的可焊性主要受化学成分及其含量的影响
B. 钢材含碳量高将增加焊接的硬脆性
C. 在钢材中加入合金元素如硅、锰、钒、钛等,将减小焊接的硬脆性
D. 硫能使焊接产生热裂纹和热脆性
[判断题]向心推力轴承可同时承受较大径向力和轴向力。
A.正确
B.错误
[不定项选择题]共用题干
Thirst for Oil
Worldwide every day,we devour the energy equivalent of about 200 million barrels of oil. Most of the energy on Earth comes from the Sun. In fact enough energy from the Sun hits the planet's surface each minute to cover our needs for an entire year,we just need to find an efficient way to use it. So far the energy in oil has been cheaper and easier to get at. But as supplies dwindle,this will change,and we will need to cure our addiction to oil.
Burning wood satisfied most energy needs until the steam-driven industrial revolution,when energy-dense coal became the fuel of choice. Coal is still used,mostly in power sta-tions,to cover one quarter of our energy needs,but its use has been declining since we star-ted pumping up oil. Coal is the least efficient,unhealthiest and most environmentally dama-ging fossil fuel,but could make a comeback,as supplies are still plentiful:its reserves are five times larger than oil's.
Today petroleum,a mineral oil obtained from below the surface of the Earth and used to produce petrol,diesel oil and various other chemical substances,provides around 40% of the world's energy needs,mostly fuelling automobiles. The US consumes a quarter of all oil,and generates a similar proportion of greenhouse gas emissions.
The majority of oil comes from the Middle East,which has half of known reserves. But other significant sources include Russia,North America,Norway,Venezuela and the North Sea. Alaska's Arctic National Wildlife Refuge could be a major new US source,to reduce reliance on foreign imports.
Most experts predict we will exhaust easily accessible reserves within 50 years,though opinions and estimates vary. We could fast reach an energy crisis in the next few decades, when demand exceeds supply. As conventional reserves become more difficult to access,oth-ers such as oil shales and tar sands may be used instead. Petrol could also be obtained from coal.
Since we started using fossil fuels,we have released 400 billion tonnes of carbon,and burning the entire reserves could eventually raise world temperatures by 13℃ .Among other horrors,this would result in the destruction of all rainforests and the melting of all
Arctic ice.
Which of the following statements is NOT meant by the author,according to the second paragraph?
A.Wood was the fuel of choice before coal.
B.The use of coal is declining.
C.Coal is the most environmentally unfriendly fuel next to oil.
D.Coal reserves are plentiful and will be likely to become the major fuel of choice.
[判断题]二氧化碳是比空气密度高的气体,常积存于巷道的底板、下山等低矮的地方。
A.正确
B.错误
[单选题]扬言实施放火、爆炸、投放危险物质扰乱公共秩序的情节较轻的,处_ ( )以下拘留或者五百元以下罚款:( )
A.三日
B.五日
C.十日
[单选题]关于总成本费用的计算公式,下列正确的是:
A.总成本费用=生产成本+期间费用
B.总成本费用=外购原材料、燃料和动力费+工资及福利费+折旧费
C.总成本费用=外购原材料、燃料和动力费+工资及福利费+折旧费+摊销费
D.总成本费用=外购原材料、燃料和动力费+工资及福利费+折旧费+摊销费+修理费
[多选题]与块煤重介质分选机的单位处理量有关系的是 ( )
A.原料煤的性质
B.槽宽
C.槽深
D.排矸轮的提升能力
E.悬浮液循环量
[单项选择]电力机车轮毂热装式温度不得超过()。
A. 200°C
B. 250°C
C. 300°C
D. 350°C
[单项选择]热力学温标T与摄氏温标t的关系为()。
A. T=t+273.15
B. T=t-273.15
C. T=t±273.15
D. T=t±273.15
[单选题]中性点不接地系统的配电变压器台架安装要求( )的接地形式。
A.变压器中性点单独接地
B.中性点和外壳一起接地
C.中性点和避雷器一起接地
D.中性点、外壳、避雷器接入同一个接地体中
[判断题]DTU设备应具有智能电源管理功能,可自动定时远方活化蓄电池。
A.正确
B.错误
[填空题]泡沫灭火器主要用于扑救哪些火灾? (1) 。
[多项选择]慢性肺源性心脏病的心,肺病变有()
A. 弥漫性肺气肿
B. 无肌型细动脉透明变性
C. 心肌纤维萎缩,横纹肌消失
D. 主动脉瓣下2cm处心室肌壁厚
[单项选择]四环素的抗菌机制为( )。
A. 影响细菌蛋白质的合成
B. 影响细菌细胞膜的通透性
C. 影响细菌细胞壁的合成
D. 影响细菌DNA的合成
E. 影响细菌RNA的合成
[单项选择]陆某,男性,45岁。反复胃脘疼痛10年,近2天,胃脘疼痛,似刀割,痛有定处,按之痛甚,痛时持久,食后加剧,入夜尤甚,黑便,舌质紫暗,脉涩。其治疗应首选的方剂是()
A. 血府逐瘀汤
B. 失笑散合丹参饮
C. 桃核承气汤
D. 身痛逐瘀汤
E. 复元活血汤
[多选题]动车组列车在车站办理客运业务时,须固定()。
A.股道
B.站台
C.停车位置
D.时间
[单选题]根据《国网福建省电力有限公司关于印发电力服务事件处置应急预案的通知》,小区户数达到(______)户以上的小区为大型小区。
A.300
B.500
C.1000
D.3000
[多选题]三极管在截至区有什么特点?
A.基极电流几乎为零;
B.没有放大作用;
C.集电极电流几乎为零;
D.三极管损坏
[多选题]1 "依据新奥能源《燃气工程建设交付体系文件》:燃气公司将准入监理单位的监理人员情况在工程数字化系统进行建档,建档资料包括( )等。
A.身份证信息
B.资格证书
C.燃气公司对监理人员的考核结果
D.监理人员的业绩
E.照片"
[单选题]一般道路警戒距离不少于()米,高速公路不少于500米,并在200米处设置第二道警戒,遇有雨、雪、雾等天气或夜间,警戒距离均应扩大1-1.5倍。
A.150
B.200
C.300
[单选题]最易发生弥散性血管内凝血的疾病是
A.前置胎盘
B.胎盘早剥
C.产后出血
D.羊水过多
E.轻度子痫前期
[判断题]银行向客户支付利息或者客户向银行缴纳手续费过程中发生的交易如符合可疑交易标准,银行应提交可疑交易报告。( )
A.正确
B.错误