热门试题:
[多选题]非电量保护装置例行巡视内容包括()。
A.温度计外观完好、指示正常,表盘密封良好,无进水、凝露,温度指示正常
B.压力释放阀、安全气道及防爆膜应完好无损
C.气体继电器内应无气体
D.气体继电器、油流速动继电器、温度计防雨措施完好
[单项选择]为取名为MenuColor的菜单项添加标记的语句是______。
A. MenuColor,Popup=True
B. MenuColor.Enabled=True
C. MenuColor.Visible=True
D. MenuColor.Checked=True
[填空题]Scientists have developed a new cancer drug. So far, they have tested it only on (36) animals. The drug is designed to (37) and kill cancer cells but not healthy cells.
First, the drug enters the cancer and destroys the supply of blood. Then it releases (38) to destroy the cancer ceils.
Researchers at the Massachusetts Institute of Technology in Cambridge carried out the study. The (39) appeared in Nature (40) . A school news release called the drug an "anti-cancer smart bomb."
Ram Sasisekharan is a professor at M.I.T. He says his team had to (41) three problems. They had to find a way to destroy the blood vessels, then to (42) the growth of new ones. But they also needed the blood vessels to supply chemicals to destroy the cancer.
So, the researchers designed a two-part "nanocell". The cell is (43) in nanometers, or one thousand millionth of a meter. (44) .
The scientist
[单选题]电缆在水平巷道或倾斜巷道内吊挂间距不得超过( )米
A.3
B.6
C.8
[判断题]可以通过手机和其他移动通信工具谈论国家机密、涉密文件信息、涉密账号密码。
A.正确
B.错误
[判断题]相位差是两个正弦交流电的初相角之差。( )
A.正确
B.错误
[判断题]已终结的工作票(含工作任务单)、故障紧急抢修单、现场勘察记录至少应保存2年。
A.正确
B.错误
[单选题]带电更换绝缘子或在绝缘子串上作业,应保证作业中良好绝缘子片数不少于:500kV( )片。
A.16
B.25
C.23
D.22
[简答题]简述建设中国特色社会主义法治体系的重大意义。
[单项选择]推选业主代表参加业主大会会议的,业主代表应当于参加业主大会会议( )日前,就业主大会会议拟讨论的事项,书面征求其所代表的业主意见。
A. 3
B. 5
C. 7
D. 10
[判断题]在确定收益年限时,如果建筑物的经济寿命早于土地使用年限而结束的,可以先根据建筑物的剩余经济寿命宋确定,选取相应的收益年限为有限年的公式进行计算。 ( )
[单选题]《铁路车站行车作业人身安全标准》规定,调车作业上车时,车速不得超过()。
A.5km/h
B.10km/h
C.15km/h
D.20km/h
[单选题]( )是指主要对企业进行财务性并购投资的股权投资基金。
A.创业投资基金
B.并购基金
C.创业投资
D.产业投资基金
[判断题]在常温下装配时应将配合面清洗洁净,并涂一薄层不含二硫化钼添加剂的润滑油;装入时用力应均匀,可以直接打击装配件。
A.正确
B.错误
[多选题]《建设工程安全生产管理条例》规定.施工单位的项目负责人应当由取得相应执业资格的人员担任.对建设工程项目的安全施工负责( ).并根据工程的特点组织制定安全施工措施.消除安全事故隐患.及时.如实报告生产安全事故。
A.建立健全安全生产责任制度
B.落实安全生产责任制度
C.落实安全生产规章制度和操作规程
D.确保安全生产费用的有效使用
E.对建设工程进行定期和专项安全检查.并向建设单位报告
[判断题]与阴极保护管道相邻的非保护管道出现明显的对地电位负向偏移,则可能是管道漏电引起的。
A.正确
B.错误
[简答题]符合什么条件的退役士兵依据本人申请可以按照有利于退役士兵生活的原则确定其安置地?
[单选题]《铁路旅客运输服务质量规范》(铁总运〔2016〕247号)规定,有空调的服务处所温度调节适宜,体感舒适,冬季原则上保持()。
A.16℃ -20℃
B.18℃ -20℃
C.18℃ -22℃
D.18℃ -26℃
[判断题]使用机车动力制动,在需要缓解时,应先解除动力制动,再缓解空气制动。
A.正确
B.错误
[判断题]主油泵供给调节及润滑油系统用油,要求其扬程—流量特性较陡。( )
A.正确
B.错误
[单项选择]维持蛋白质高级结构的分子间作用力不包括()
A. 共价键
B. 氢键
C. 离子键
D. 范德华力
E. 疏水作用
[单项选择]根尖肉芽肿主要特征为()
A. 以淋巴细胞、浆细胞、巨噬细胞浸润根尖周组织,并有肉芽组织形成
B. 可见血管内皮细胞和成纤维细胞增生
C. 周围主要是中性粒细胞、巨噬细胞,外围以密集的淋巴细胞、浆细胞
D. 中性粒细胞、边缘可见巨噬细胞邻近牙周膜和骨髓可见血管充血
E. 肉芽肿周围可见有上皮存在
[多选题]下列情形中,纳税人应当进行土地增值税清算的有( )。
A.直接转让土地使用权的
B.整体转让未竣工决算房地产开发项目的
C.房地产开发项目全部竣工并完成销售的
D.取得销售(预售)许可证满3年仍未销售完的
[单选题]施工起重机械和整体提升脚手架、模板等自升式架设设施安装完毕后,安装单位应当自检,出具自检合格证明,并向()进行安全使用说明,办理验收手续并签字。
A.设计单位
B.建设单位
C.施工单位
D.监理单位
E.略
F.略
[判断题]按岩石坚固性进行分级的方法,即普氏分级方法。
[单项选择] Questions 9 to 10 are based on the following conversation. At the end of the conversation, you will be given 10 seconds to answer the questions.
Now, listen to the conversation.
Which of the following is most appropriate to describe Peter after the camping
A. He is now very sensitive.
B. He is more independent than before.
C. His physical condition improved a lot.
D. He is much more persistent and stronger.
[不定项选择题]共用题干
Less Is More
It sounds all wrong-drilling holes in a piece of wood to make it more resistant to knocks.But it works because the energy from the blow gets distributed throughout the wood rather than focusing on one weak spot.The discovery should lead to more effective and lighter packaging materials.Carpenters have known______(51) centuries that some woods are tougher than others.Hickory(山核桃木),for example, was turned into axe handles and cartwheel spokes(轮辐)because it can absorb shocks without breaking.
White oak,for example,is much more easily damaged,______(52)it is almost as dense.Julian Vincent at Bathe University and his team were convinced that the wood's internal structure could explain the differences. Many trees have tubular(管状的)vessels that run _______(53) the trunk and carry water to the leaves.In oak they are large,and arranged in narrow bands,but in hickory they are smaller,and more
evenly distributed.The researchers_______(54)this layout might distribute a blow's energy throughout the wood,soaking up a bigger hit.To test the idea,they drilled holes 0.65 millimetres across into a block of spruce(云杉),a wood with ________( 55 ) vessels , and found that______( 56 ) withstood a harder knock.______(57)when there were more than about 30 holes per square centimetre did the wood's performance drop off. A uniform substance doesn't cope well with knocks because only a small proportion of the material is actually______(58).All the energy from the blow goes towards breaking the material in one or two places , but often the pieces left ______(59 ) are pristine(未经破坏的).
But instead of the energy being concentrated in one place,the holes provide many weak spots that all absorb energy as they break,says Vincent."You are controlling the places_______(60)the wood breaks,and it can then absorb more______(61),more safely."The researchers believe the principle could be applied to any material________(62)example,to manufacture lighter and more protective packaging.It could_______(63)be used in car bumpers,crash barriers and armour for military vehicles,says Ulrike Wegst,a_______(64)at the Max Plank Institute for Mental Research in Stuttgart.
But she emphasizes that you______(65)to design the substance with the direction of force in mind. "The direction of loading is crucial,"she says.
54._________
A.knew
B.concluded
C.saw
D.thought
[单选题]车站公共区的防火巡查运营时间至少()一次
A.每1.5小时
B.每2小时
C.每3小时
D.每半个小时
[单选题]根据《中国铁路总公司关于调整乘务人员施工人员生活补贴标准的通知》(铁总劳卫〔2019〕6号),列车员乘务津贴标准是 ( )
A.每小时2.0元
B.每小时2.4元
C.每小时5.0元
D.每小时2.2元
[不定项选择题]某动迁房住宅小区工程的设计文件规定,房屋合理使用年限为50年。住宅小区工程于2010年1月竣工验收合格后交付分配使用。2011年6月,住宅小区物业公司书面通知施工单位,要求对以下四个质量问题进行维修:①住户装修中擅自改变承重结构,造成原有砼梁底出现裂缝;②原有外墙和屋面渗水;③原有房顶粉刷出现细小裂缝;④原有给水管道爆裂。
根据以上资料,回答下列问题:
给水管道的保修期限为( )年。
A.2
B.5
C.50
D.70
[判断题](47259)( )轻型车辆及小车应放置在固定的安全地点不需要加锁,使用前应进行检查,确认状态良好时方可上道。(1.0分)
A.正确
B.错误
[多选题]操作液压大钳时,严禁操作人员把手放在( )处。
A. 液压大钳移送气缸
B.大钳旋转部位
C.液压大钳加紧气缸
D.液压大钳换向手柄。
[单项选择]根据《劳动防护用品监督管理规定》的有关规定,劳动防护用品生产企业所生产的特种劳动防护用品,必须取得特种劳动防护用品( ),否则不得生产和销售。
A. 安全标志
B. 安全生产许可证
C. 产品合格证
D. 工商营业证
[判断题]( )提速道岔混凝土岔枕采用预埋塑料套管与螺栓,不采用硫磺锚固。
A.正确
B.错误
[单选题]涉疫勤务完成后,装备器材洗消的程序是( )。
A. 作业装备器材分类—药剂洗消—清水清洗—晾干
B. 人员药剂洗消—装备器材药剂洗消—清水清洗—晾干
C. 装备器材上车—车辆整体药剂洗消—清水清洗—晾干
D. 作业装备器材药剂洗消—随车所有装备器材药剂洗消—清水清洗—晾干
[单项选择]商业银行不得代客投资于国际公认评级机构评级( )以下的证券。
A. BBB级
B. A级
C. AA级
D. AAA级
[单选题]半径为500m的曲线,正线圆曲线正矢最大最小值差超过( )为超限。 (A 、3、A)[020102]
A.18 mm
B.15 mm
C.12 mm
D.9 mm
[单项选择]男,50岁,有慢性肝炎病史20年,4小时前吃苹果后,突然呕出暗红色液约400ml。查体BP6.7/4.0kPa(50/30mmHg),P140次/min,神志淡膜,贫血貌,皮肤巩膜无黄染,脾肋下5cm,质软,无压痛。移动性浊音阳性。诊断为食管胃底静脉曲张破裂出血,失血性休克经药物治疗后,患者仍然吐血,可考虑下面哪一种措施()
A. 继续补液输血
B. 插三腔二囊管压迫止血
C. 插胃管
D. 插尿管
E. 静脉注射止吐药物