热门试题:
[判断题]煤矿井下对使用中的斜井人车防坠器,应当每班进行1次手动落闸试验、每月进行1次静止松绳落闸试验、每年进行1次重载全速脱钩试验。
A.正确
B.错误
[简答题]根据给定材料的内容，概括资料所反映的主要问题。要求：概述全面，观点鲜明，条理清楚，不超过300字。
[单项选择]细胞病理学创立于（）。
A. 16世纪
B. 17世纪
C. 18世纪
D. 19世纪
E. 20世纪
[填空题]三种最基本的网络拓扑结构不包含的是（）。
[多选题]27、招标工程量清单应由（?）组成。
A.分部分项工程项目清单
B.措施项目清单
C.风险项目清单
D.其他项目清单
E.规费和税金项目清单
[多项选择]咨询工程师在合同管理中的作用是( )。
A. 评价工程项目利弊
B. 协助业主设计合同体系方案
C. 协助业主与承包商进行合同谈判
D. 协助业主签订合同
E. 监督、管理合同的履行
[单项选择]Last Wednesday in Sewanee, Tenn., the University of the South elected a new leader, John M. McCardell Jr. As I sat listening to McCardell accept his election, I thought, not for the first time, about the difficulty of making the case for something so expensive and so seemingly old—an undergraduate liberal education—in an economic and cultural climate that favors efficiency and tangibility(确切性). It is inarguably hard to monetize a familiarity with Homer or an intimacy with Shakespeare.
It is just possible, though, that the traditional understanding of the liberal arts may help us in our search for new innovation and new competitiveness. The next chapter of the nation’s economic life could well be written not only by engineers but by entrepreneurs who, as products of an apparently different education, have formed a habit of mind that enables them to connect ideas that might otherwise have gone unconnected. As Alan Brinkley, the historian and former provost(院长) of Columbia, has arg
A. will definitely guarantee people a good economic life
B. will only be seen in provinces of the already wealthy
C. should be cut off in private schools and state universities
D. should be continued in spite of the shortage of money
[判断题]发现设备缺陷及异常时，应及时汇报并采取必要紧急措施，不得擅自处置。
A.正确
B.错误
[单选题]“合则彼此有利,分则伤害大家”这句话告诉我们( )。
A.要注重沟通
B.要注重协作
C.要从小事做起
D.要具有敬业精神
[填空题]活塞与气缸间的配合间隙均有一定的要求，可通过测量（）的直径来确定，两者的差值即为配合间隙。
[单项选择]糖尿病神经并发症中，最常见的是（）
A. 脊髓病变
B. 神经根病变
C. 周围神经病变
D. 中枢神经系统病变
E. 脑神经病变
[不定项选择题]共用题干
New Understanding of Natural Silk's Mysteries
Natural silk,as we all know,has a strength that man-made materials have long struggled to match.In a
discovery that sounds more like an ancient Chinese proverb than a materials science breakthrough,MIT re-
searchers have discovered that silk gets its strength from its weakness.Or,more specifically,its many weak-
nesses. Silk gets its extraordinary durability and ductility（柔韧性）from an unusual arrangement of hydrogen
bonds that are intrinsically very weak but that work together to create a strong,flexible structure.
Most materials一especially the ones we engineer for strength一get their toughness from brittleness.As
such,natural silks like those produced by spiders have long fascinated both biologists and engineers because of
their light weight,ductility and high strength(pound for pound,silk is stronger than steel and far less brittle).
But on its face,it doesn't seem that silks should be as strong as they are;molecularly,they are held together by
hydrogen bonds , which are far weaker than the covalent（共价的）bonds found in other molecules.
To get a better understanding of how silk manages to produce such strength through such weak bonds,
the MIT team created a set of computer models that allowed them to observe the way silk behaves at the
atomic level. They found that the arrangement of the tiny silk nanocrystals（纳米晶体）is such that the hydro-
gen bonds are able to work cooperatively,reinforcing one another against external forces and failing slowly
when they do fail,so as not to allow a sudden fracture to spread across a silk structure.
The result is natural silks that can stretch and bend while retaining a high degree of strength.But while
that's all well and good for spiders,bees and the like,this understanding of silk geometry could lead to new
materials that are stronger and more ductile than those we can currently manufacture.Our best and strongest
materials are generally expensive and difficult to produce(requiring high temperature treatments or
energy-intensive processes).
By looking to silk as a model,researchers could potentially devise new manufacturing methods that rely
on inexpensive materials and weak bonds to create less rigid,more forgiving materials that are nonetheless
stronger than anything currently on offer. And if you thought you were going to get out of this materials
science story without hearing about carbon nanotubes（纳米碳管）, think again. The MIT team is already in
the lab looking into ways of synthesizing silk-like structures out of materials that are stronger than natural
silk-like carbon nanotubes. Super-silks are on the horizon.
MIT researchers carry out the study to illustrate an ancient Chinese proverb.
A.Right
B.Wrong
C.Not mentioned
[单项选择]血浆中作用最强的促红细胞缗钱状聚集的物质是（ ）
A. 清蛋白
B. β-球蛋白
C. γ-球蛋白
D. 纤维蛋白原
E. 胆固醇
[单选题]《铁路旅客运输服务质量规范》中规定，硬卧车、软卧车（含高级软卧车）厕所配有大盘卷筒卫生纸，坐便器配有（ ）。
A.一次性坐便垫圈
B.可循环使用坐便垫圈
C.布制坐便垫圈
D.湿巾擦拭
[判断题]安规规定：因超劳引发铁路交通事故，不追究铁路局有关单位领导的责任。
A.正确
B.错误
[判断题]从业人员在职业活动中，要求做到仪表端庄语言规范举止得体待人热情（ ）
A.正确
B.错误
[单项选择]女性，患儿，2岁，因先天性腭裂拟行腭裂修复术，最适合采用的麻醉方法是
A. 中药府醉
B. 强化麻醉+局部麻醉
C. 开放性吸入麻醉
D. 气管内插管麻醉
E. 氯胺酮分离麻醉
[简答题]闸阀是指闸板沿通路中心线的垂直方向移动的阀门。
[单项选择]下列腹腔器官中，外周无包膜的是（）。
A. 肝
B. 胰
C. 脾
D. 肾
E. 子宫
[多项选择]属于渗出液的腹水为（）。
A. 清晰淡黄色
B. 脓性
C. 血性
D. 乳糜性
E. 浆液脓性
[单选题]一、二级耐火等级多层敞开式外廊教学楼,位于两个楼梯间之间的直接通向疏散走道的教室,其疏散门至最近的楼梯间的最大允许距离为()。
A.30米
B.35米
C.40米
D.45米
[判断题]外毒素的毒性作用强，小剂量就能使易感机体致死。
A.正确
B.错误
[单选题]数据元素类型是数据元素值的类型表示形式，包括数据元素（）。
A.标识
B.长度
C.格式
D.名称
[判断题]党支部换届选举前期准备过程中，通过两上两下，确定支委候选人初步人员。
A.正确
B.错误
[判断题]“青如天、明如镜、薄如纸、声如磬”是对景德镇“影青”瓷的描述。( )
A.正确
B.错误
[判断题]仇某请读大学的表兄魏某代替自己参加高考,魏某参加考试时被发现代考。仇某、魏某涉嫌代替考试罪。
A.正确
B.错误
[多选题]关闭设备:( )
A. 舱口盖
B. 小舱盖和人孔盖
C. 漏水口
D. 船用门
E.船用窗
[判断题]头车半自动车钩，车钩与车体安装螺栓的螺栓规格是M22。
A.正确
B.错误
[判断题]被收缴人对中国人民银行分支机构作出的鉴定结果有异议可以申请再鉴定。( )
A.正确
B.错误
[单选题]某县安全监管部门在执法检查中发现某非煤矿山企业存在重大事故隐患，遂依法责令该企业局部停产治理。该企业对隐患治理后，向县安全监管部门提出恢复生产的书面申请。依据《安全生产事故隐患排查治理暂行规定》，县安全监管部门在收到申请报告后（ ）。
A.在7日内进行现场审核，经审查认定为仍不合格，提请县人民政府关闭该企业
B.在10日内进行现场审查，经审查认定为仍不合格，对该企业下达停产整改指令
C.在15日内进行现场审查，经审查判定合格后，对该企业的事故隐患进行核销，同意其恢复生产经营
D.在30日内进行现场审查，经审查判定合格后，对该企业的事故隐患不需进行核销，立即同意该企业恢复生产经营
[单选题]( )是用摊制法中的成品成型法制成的。
A.煎饼
B.饺子皮
C.春卷皮
D.包子皮
[单项选择]女性患者38岁，近5年多次于情绪激动或生气后出现四肢抽搐，伴颈后仰，两眼紧闭，过度换气，每次抽搐发作持续数分钟至数小时不等。患者无头外伤史，抽搐发作时未出现过舌咬伤和大小便失禁。神经系统检查无异常，头颅CT及脑电图正常。该患者在抽搐发作时不会出现的情况是（）。
A. 双侧瞳孔扩大
B. 呼吸性碱中毒
C. 意识丧失
D. 手足麻木
E. 颜面苍白
[单选题]英国哲学家洛克提出了“白板说”，认为外部的力量决定了人的发展，这是一种（ ）。
A.外铄论的观点
B.内发论的观
C.多因素论的观点
D.反映论的观点
[判断题]马克思主义中国化的第一个重大理论成果是新民主主义理论。( )
A.正确
B.错误
[简答题]某新上配电台区日线损率在5日至29日期间长期处于高损范围，且波动频繁。其中，日线损率最高值与最低值分别为65.54%、27.15%。已知该台区配变容量1000kVA，用户数135户，台区日均供电量约为250kWh
[单项选择]关于麻疹黏膜斑的描述，正确的是（）
A. 颊黏膜上出现黑色色素沉着
B. 颊黏膜上出现瘀斑
C. 位于第一磨牙的颊黏膜上，片状白斑
D. 位于第二磨牙的颊黏膜上，针尖大小白色斑点
E. 位于颊黏膜上，高出黏膜表面
[多选题]砌筑砂浆试块强度验收时，强度合格标准应符合（ ）规定。（GB50203—2011《砌体结构工程施工质量验收规范》4.0.12）
A.同一验收批砂浆试块强度平均值应大于或等于设计强度等级值的1.10倍
B.同一验收批砂浆试块抗压强度的最小一组平均值应大于或等于设计强度等级值的85%
C.砂浆强度应以标准养护，28d龄期的试块抗压强度为准
D.制作砂浆试块的砂浆稠度应与配合比设计一致
