热门试题:
[单选题] 正常生产时,急冷塔塔顶温度高的原因,以下哪项不正确( )。
A.克劳斯尾气中二氧化硫含量上升
B.急冷塔压力上升
C.急冷水温度高
D.克劳斯尾气温度高
[单选题]列车运行速度不超过120km/h的区段,预告信号机与其主体信号机的安装距离应≥( )。[923000000]
A.200m
B.400m
C.800m
D.1000m
[多选题]关于施工升降机层门的安装要求,下列说法正确的有( )
A.层门不得向吊笼升降通道开启
B.楼层平台不应与施工升降机钢结构相连接
C.各楼层应设置楼层标识,夜间施工应有照明
D.水平或垂直滑动的层门应有导向装置,其运动应通过机械式限位装置限位
E.应有保护手指不被门压伤的措施
[多选题]补仓采购物资入库后,财务部门凭( ) 等支付采购货款。
A.送货单
B.入库单据
C.合同
D.发票
[单项选择](In Hawaii), people are (friendly) and always warmly welcomed visitors.
A. A
B. B
C. C
D. D
[判断题]铸钢侧架发生裂纹,A区比B区的危害小。
A.正确
B.错误
[单选题]电流互感器能将高压系统中的电流或低压系统中的大电流,变成低压的标准小电流( ),用于给测量仪表和继电器供电。
A.2 A
B.3 A
C.4 A
D.5 A
[单选题]围绕不断提高维护人民安全的能力和水平;下列选项中不属于重点做好维护公共安全的措施有( )。
A.坚持多方参与,合作共享风险共治
B.坚持高压态势。严厉惩戒以做效尤
C.坚持科技引领法治保障文化支撑
D.创新理念思路体制机制方法手段
[多选题]图形数据输入包括( )。
A.数字化仪输入
B.扫描仪输入
C.键盘输入
D.手工输入
[判断题]列车因旅客吸烟降速停车后,列车长要亲自到车厢内宣传降速停车原因,并提醒旅客不要在动车组内吸烟。
A.正确
B.错误
[单项选择]
Pollution: A Life and Death Issue
One of the main themes of Planet under Pressure is the way many of the Earth’s environmental crises reinforce one another. Pollution is an obvious example-we do not have the option of growing food, or finding enough water, on a squeaky- clean planet, but on one increasingly tarnished and trashed by the way we have used it so far.
Cutting waste and clearing up pollution cost money. Yet time and again it is the quest for wealth that generates much of the mess in the first place. Living in a way that is less damaging to the Earth is not easy, but it is vital, because pollution is pervasive and often life-threatening.There is a U. N. convention that can cover ______.
[A] problem between neighbors [C] problems on air pollution
[B] problem between states which do not share a border [D] trans-boundary air pollution
[填空题]列车摘挂补机或第一机车的自动制动机损坏交由第二机车操纵时;应对列车自动制动机进行()试验。
[简答题]常规技术设计中哪方面的知识使之可能区别于科学知识?
[单项选择]土地市场供需调控的方向中,选择凋控日标的确定依据是( )。
A. 一定时期内土地市场发展措施
B. 一定时期内土地市场发展目标
C. 一定时期内土地市场发展手段
D. 一定时期内土地市场发展水平
[判断题]( )大中片率是指≥12.7mm的叶片质量占总试样总质量的比率,以百分数表示。( )
A.正确
B.错误
[单项选择]下述冰川地貌中()为冰碛地貌。
A. 冰斗
B. 角峰
C. 冰前扇地
D. 悬谷
[单项选择]第一篇Energy and Public Lands
The United States boasts substantial energy resources. Federal lands provide a good deal of U.S. energy production; the U.S. Department of the Interior manages federal energy leasing, both on land and on the offshore Outer Continental Shelf. Production from these sources amounts to nearly 30 percent of total annual U.S. energy production.
In 2000, 32 percent of U.S. oil, 35 percent of natural gas, and 37 percent of coal were produced from federal lands, representing 20,000 producing oil and gas leases and 135 producing coal leases. Federal lands are also estimated to contain approximately 68 percent of all undiscovered U.S. oil reserves and 74 percent of undiscovered natural gas.
Revenues from federal oil, gas, and coal leasing provide significant returns to U.S. taxpayers as well as State governments. In 1999, for example, $553 million in oil and gas revenues were paid to the U.S. Treasury, and non-Indian coal leases accounted for over $304 million in rev
A. Public lands are one of the main sources of revenues.
B. Public lands play an important role in energy production.
C. Public lands should be developed to ease energy shortage.
D. Public lands store huge energy resources for further development.
[单选题]周转箱喷码字体为()
A.A.黑体
B.B.宋体
C.C.仿宋
D.D.微软雅黑
[单选题]( )是旅游业发展的前提,是旅游业的基础。
A.旅游者
B.旅游资源
C.旅游交通
D.旅游商品
[单项选择]井下空气中氧气含量会影响煤尘爆炸的发生。当氧气含量低于()时,煤尘不能被引燃而失去爆炸性。
A. 16%
B. 17%
C. 18%
[单选题] 正常情况直线杆塔仅承受()。
A.、导线顺线路方向的张力
B.、导线、绝缘子、覆冰等重量和风力
C.、相邻两档导线的不平衡张力
[多选题]铁垫板与普通道钉应齐全,作用良好,伤损达到下列标准,应有计划地更换。
A.铁垫板折断
B.铁垫板变形
C.道钉钉头脱落
D.铁垫板丧失固定立柱螺栓功能
E.道钉下颏磨耗达3mm及以上
[单项选择]Which statement best describes OSPF external LSAs (type 5)?()
A. OSPF external LSAs are automatically flooded into all OSPF areas, unlike type 7 LSAs, which require that redistribution be configured.
B. External LSAs (type 5) are automatically changed to type 1 LSAs at ASBRs.
C. Type 5 LSAs are route summaries describing routes to networks outside the OSPF Autonomous System.
D. External network LSAs (type 5) redistributed from other routing protocols into OSPF are not permitted to flood into a stub area.
[填空题]影响动车组出入的段管线接触网检修纳入所在 车务直属站段的<--NRC-->管理
[简答题]与同事相处,要保持一定距离,不愠不火,对此你怎么理解?
[填空题]装载加固方案应包括货物规格、( )、装载加固材料(装置)、装载方法、加固方法、其他要求等内容。
[单选题] “安全发展”重点包含三层含义,下列选项中不属于这三层含义的是()。
A. “以人为本”必须要以人的生命为本
B. 经济社会发展必须以安全为基础、前提和保障
C. 重视人的安全需要
D. 构建社会主义必须解决安全生产问题
[单选题]脑脊液的产生部位( )。
A.脑表面的动脉
B.脑静脉
C.脑室内的脉络丛
D.室管膜
E.脑表面的脉络丛
[单选题]存放焊条的库房要严格控制房的温度和湿度,,相对湿度不高于_____%。
A.40
B.50
C.60
D.70
[多选题] 服用帕罗西汀期间严密观察是否出现(),特别是在增加或减少剂量的时候。
A.病情恶化
B.自杀倾向
C.行为异常变化
D.行为异常想法
[单选题]当机床设备的轴承圆周运动速度较高时,应采用润滑油润滑。下列( )不是润滑油的润滑方式。
A.浸油润滑
B.滴油润滑
C.喷雾润滑
D.润滑脂
[多选题]关于工作场所的照明,以下说法中正确的是()。
A.应该保证足够的亮度
B.在操作盘、重要表计、主要楼梯、通道、调控中心、机房、控制室等地点,还应设有事故照明
C.现场的临时照明线路应相对固定,并经常检查、维修
D.照明灯具的悬挂高度应不低于2.5m,并不得任意挪动;低于2.5m时应设保护罩
[判断题]中压水带按耐压可分为0、8 MPa、2、5 MPa、4、0 MPa等。( )
A.正确
B.错误
[判断题]新民主主义革命不是一般地反对资本主义和资产阶级。( )
A.正确
B.错误