热门试题:
[判断题]机器制图中三视图指的是主视图俯视图和侧视图。
A.正确
B.错误
[多选题]劳保防护用品有( )。
A.安全帽
B.反光背心
C.工作服
D.劳保鞋
E.雨衣
[不定项选择题]共用题干
Batteries Built by Viruses
What do chicken pox,the common cold,the flu,and AIDS have in common?They're all diseases caused by viruses,tiny microorganisms that can pass from person to person. It's no wonder that when most people think about viruses,finding ways to steer clear of viruses is what's on people's minds.
Not everyone runs from the tiny disease carriers,though. In Cambridge,Massachu- setts,scientists have discovered that some viruses can be helpful in an unusual way. They are putting viruses to work,teaching them to build some of the world's smallest rechargeable batteries.
Viruses and batteries may seem like an unusual pair,but they're not so strange for engi-neer Angela Beicher,who first came up with the idea. At the Massachusetts Institute of
Technology(MIT)in Cambridge,she and her collaborators bring together different areas of science in new ways.In the case of the virus-built batteries,the scientists combine what they know about biology,technology and production techniques.
Beicher's team includes Paula Hammond,who helps put together the tiny batteries,and
Yet-Ming Chiang,an expert on how to store energy in the form of a battery.“We're working on things we traditionally don't associate with nature,”says Hammond.
Many batteries are already pretty small. You can hold A,C and D batteries in your hand. The coin-like batteries that power watches are often smaller than a penny. However, every year,new electronic devices like personal music players or cell phones get smaller than the year before. As these devices shrink,ordinary batteries won't be small enough to fit in-side.
The ideal battery will store a lot of energy in a small package. Right now,Belcher's model battery,a metallic disk completely built by viruses,looks like a regular watch battery. But inside,its components are very small一so tiny you can only see them with a powerful microscope.
How small are these battery parts?To get some idea of the size,pluck one hair from your head. Place your hair on a piece of white paper and try to see how wide your hair is一 pretty thin,right?Although the width of each person's hair is a bit different,you could probably fit about 10 of these virus-built battery parts,side to side,across one hair. These micro-batteries may change the way we look at viruses.
According to the first paragraph,people try to
A.kill microorganisms related to chicken pox,the flu,etc
B.keep themselves away from viruses because they are invisible
C.stay away from viruses because they are causes of various diseases
D.cure themselves of virus-related diseases by taking medicines
[多选题]下面关于高处作业吊篮的维护,说法正确的是( )。
A.A、吊篮应按使用说明书要求进行检查、测试、维护保养。
B.B、随行电缆损坏或有明显擦伤时,应立即维护和更换。
C.C、钢丝绳不得折弯,不得沾有砂浆杂物等。
D.D、定期检查安全锁;提升机若发生异常温升和声响,应立即停止使用。
E.E、除非测试、检查和维修需要,任何人不得使安全装置或电器保护装置失效。在完成测试、检查和维修后,应立即将这些装置恢复到正常状态。
[单选题]账户在久悬状态满5年,系统自动于每季度末月21日将满足条件的久悬账户余额结转至()。
A.“525004”其他营业外收入
B.“268001”久悬未取款项
C.“531009”支付久悬未取款项
D.“268012”其他应付款。
[判断题] 正线发生道岔故障时,首列车通过人工钩锁的道岔故障区段须限速25km/h 运行,司机须加强线路检查,如发现异常及时采取措施并报行调处理。 (
A.正确
B.错误
[单选题]在气路图中,标示在风缸上的数字含义为( )。
A.容量
B.重量
C.长度
D.高度
[单选题]桥式起重机吊着重物行走时,应遵守以下( )规定?(1)禁止重物从人和设备的上方通过;(2)重物通过路线上没有障碍物时,重物底部离地面2米以上;(3)起重机上禁止有人停留。
A.(1)和(2)
B.(1)和(3)
C.(1)(2)(3)
[简答题]特种加工与传统加工方法有哪些区别和特点?
[多选题]消防员可利用地形、地物,依托( )等设置水枪(炮)阵地。
A.防火墙
B.防火门
C.窗
D.承重构件
[多选题]成煤必须具备的先决条件是( )。
A.气候条件
B.植物条件
C.地壳运动条件
D.地理条件
[多项选择]行政复议是一种()。
A. 依申请的行政行为
B. 依职权的行政行为
C. 内部行政行为
D. 外部行政行为
[单项选择]均衡水平的GDP与潜在GDP的关系是()。
A. 两者完全等同
B. 除了特殊的失衡状态,GDP均衡水平就是潜在的GDP水平
C. GDP的均衡水平完全不可能是潜在的GDP水平
D. GDP的均衡水平可能是也可能不是潜在的GDP水平
[多项选择]细菌的菌落根据表面特征不同,可分为()
A. 粗糙型菌落
B. 光滑型菌落
C. 黏液型菌落
D. 颗粒型菌落
E. 花边型菌落
[多选题]港口岸电临水工作时,应穿戴()及(),不得单人进行临水工作。
A.安全帽
B.工作服
C.救生衣
D.防滑鞋
[多选题]在公司深化全面从严治党的实践中,不断强化( ),推动积极健康的党内政治文化深入发展。
A.政治引领
B.党建引领
C.思想引领
D.组织引领
E.价值引领
[多选题]甲市是一个地级市,乙县和丙县是该市所辖范围内的县。下列情形符合相关规定的是:
A.乙县公安局督察部门查处了本局几名民警违法违纪行为,应当向甲市公安局督察部门报告查处情况
B.甲市公安局督察部门认为丙县公安局作出的某项命令有误,可以在部门全体会议决定撤销该项命令后,直接发丙县公安局执行
C.甲市公安局督察部门认为丙县公安局督察部门办事不力,只能责令丙县公安局督察部门再次执行
D.乙县公安局督察部门认为本局交警队没有执行好甲市公安局下达的命令,可以责令其认真执行
[填空题]Shyness is the cause of much unhappiness for a great many people. Shy people are anxious and (36) ; that is, they are excessively concerned with their own appearance and actions. (37) thoughts are constantly occurring in their minds: what kind of impression am I making Do they like me Do I sound stupid Am I wearing (38) clothes
It is obvious that such uncomfortable feelings must affect people (39) . A person’s self-concept is (40) in the way he or she behaves, and the way a person behaves affects other people’s (41) . In general, the way people think about themselves has a (42) effect on all areas of their lives.
Shy people are very sensitive to (43) ; they feel it confirms their inferiority. (44) . A shy person may respond to a compliment with a statement like this one: "You’re just saying that to make me feel good. I know it’s not true." (45) .
Can shyness be complete
[判断题]投资部是基金投资运作的具体执行部门,负责组织、制定和执行交易计划。 ( )
[判断题]森林公园范围内的森林资源和其他旅游资源由森林公园管理机构依法管理、保护和合理利用,可以出租和转让。
[单选题]带钢芯架空绝缘线的型号为(____)
A.JKLYJ
B. JKLGYJ
C. LGJ
D. LJ
[判断题]重载铁路正线、到发线道岔每年维修两遍。
A.正确
B.错误
[单选题]成本推动型通货膨胀理论是从( )方面来分析通货膨胀成因的。
A.供给
B.需求
C.结构
D.预期
[单项选择]附注:“0000 3634 1563 2606 1316 2460 0671 2673”,译电为()。
A. 楳
B. 栎
C. 椿
D. 楷
[单选题]患儿女,1岁,阵发性哭闹半天,1小时前排果酱样大便一次,分诊护士考虑该患儿可能的诊断是
A.急性阑尾炎
B.肠蛔虫症
C.肠套叠
D.肠扭转
E.肠道畸形
[多项选择]全国造价工程师执业资格有以下几种方式取得()
A. 全国造价工程师执业资格统一考试
B. 资格互认
C. 通过我省全国造价员考试
D. 资格认定
[单项选择]视错觉是人们对形的错误判断,但是运用得当会有助于建筑造型。以下()实例中成功地运用了视错觉原理。
A. 古希腊帕提农神庙
B. 古埃及金字塔
C. 北京故宫的午门
D. 纽约世界贸易中心双塔
[多选题]()可以成为行政复议被申请人
A.行政复议机关
B.县级以上地方人民政府设
立的派出机关
C.法律、法规授权的组织
D.接受行政机关的委托作出
具体行政行为的组织
[单选题]货币供应量、利率等一般作为中央银行货币政策的()目标。
A.货币政策
B.中介
C.操作
D.最终
[单选题]任何人发现有违反电业安全规程的情况,应立即制止,经( )后才能恢复作业。
A.批准
B.纠正
C.许可
D.教育
[单选题]无线天线避雷针的接地装置应单独设置,并距环形接地装置( )以上
A.15m
B.20m
C.25m
D.30m
[单选题]隔离开关应有( )装置。
A.防误闭锁
B.锁
C.机械锁
D.万能锁
[简答题]某医院计划用长为30米,宽为1.8米的白布,做成两直角边都是0.6米的救护用的三角巾,可以做成多少块?
[多选题]处置液化石油气泄漏设立警戒有哪些要求。( )
A.确定警戒范围
B.设立警戒标志
C.布置警戒人员
D.严格人员出入
[单项选择]1951年颁布的《劳动保险条例》规定,每个参保单位缴纳的劳动保险基金占其工资总额的()
A. 3%
B. 4%
C. 5%
D. 6%
[多选题] 办理治安案件所查获的(),应当收缴,按照规定处理。
A. 借来用于实施违反治安管理行为的工具
B. 毒品、淫秽物品等违禁品
C. 赌具、赌资
D. 吸食、注射毒品的用具