热门试题:
[单选题]某持有股票资产的投资者,担心将来股票市场下跌,最适合采取( )策略。
A.股指期货和股票间的套利
B.股指期货跨期套利
C.股指期货空头套期保值
D.股指期货多头套期保值
[单项选择]( )是职业生涯管理中的关键过程。
A. 职业生涯确定
B. 职业生涯发展
C. 职业生涯规划
D. 管理继任规划
[多选题]多选题 制定《国家电网公司电力安全工作规程(电网建设部分)》是为了贯彻执行()的安全工作方针。
A.以人为本
B.安全第一
C.预防为主
D.综合治理
[多选题]心肺复苏术操作是否正确,主要靠平时严格训练,掌握正确的方法。而在急救中判断复苏是否有效,可以根据以下( )、出现自主呼吸几方面综合考虑。
A.瞳孔
B. 面色(口唇)
C. 颈动脉搏动
D. 神志
[单选题]设备内含有油垢的氧化铁沉积物清洗,先用酸洗去油垢,然后清水洗涤,接着进行碱洗。( )
A.正确
B.错误
[单选题]铸轧速度提高,液穴()
A.、不变
B.、减小
C.、加深
D.、不确定
[单项选择][复合型非选择题]男患,65岁,以"在劳动时出现剧烈头痛2小时"为主诉,来急诊,既往高血压史8年。查体:血压180/110mmHg,浅昏迷,瞳孔左>右,左侧瞳孔对光反射消失,右侧上肢坠落试验(+)、下肢外旋位,右侧Babinski征(+),左侧Gordon征(+)。依据其症状和体征,估计患者的病变部位最可能在()
A. 脑桥
B. 双侧额叶
C. 左侧顶叶
D. 左侧基底节区
E. 脑室
[单项选择]下列关于材料费的说法不正确的是( )。
A. 材料的检验试验费包括新结构、新材料的试验费
B. 材料费是施工过程中耗用的构成工程实体的原材料、辅助材料、构配件、零件和半成品的费用
C. 材料费=∑(材料消耗量×材料基价)+检验试验费
D. 材料的检验试验费是对建筑材料、构件和建筑安装物进行一般鉴定、检查所发生的费用
[多选题]企业客户跨行转账,以下选项中哪几项需要银行柜面做落地授权处理()
A.A、50万
B.B、600万
C.C、100万
D.D、500万
[单项选择]()采用集权和分权管理并存的管理特征。
A. 控股型企业集团
B. 产业型企业集团
C. 管理型企业集团
D. 国有型企业集团
[判断题]近5年内由于本人直接责任,发生一般事故的不得参加广铁工匠选树。 ( )
A.正确
B.错误
[单项选择]学习骑自行车后不利于学习骑三轮车,这种迁移属于()
A. 顺向正迁移
B. 顺向负迁移
C. 逆向正迁移
D. 逆向负迁移
[判断题]货检站在处置铁路交通突发事件时,应坚持“调度集中统一指挥、行车逐级单一指挥”的原则。
A.正确
B.错误
[多选题]火灾现场勘验的主要任务是( )。
A.获取认定起火部位、起火点的证据
B.获取认定起火物的证据
C.获取确定引火源的证据
D.消防设施的运行状况及其他有关情况
[单项选择]离心泵的一级项修检修周期是累计运行()h。
A. 1000
B. 1200
C. 1500
D. 2000
[判断题]公文中的标题由发文机关、事由和文种组成,某些情况可省略发文机关。( )
A.正确
B.错误
[单选题] “邓小平同志留给我们的最重要的思想和政治遗产,就是:()
A.他带领党和人民开创的中国特色社会主义,就是他创立的邓小平理论。
B.一国两制的伟大构想与成功实践
C.对当今时代背景的科学把握与概括
D.《邓小平文选》
[判断题] 蓝色预警级别要高于黄色预警。
A.正确
B.错误
[多选题]配电线路拉线按形式分可分为:( )。 ( )
A.张力拉线
B.墙装拉线
C.水平拉线
D. 普通拉线
[单选题]风险控制措施应在实施前针对以下哪项内容可以不用进行评审()。
A.企业培训教育措施
B.措施的可行性和有效性
C.是否使风险降低至可接受风险
D.是否产生新的危险源或危险有害因素
[单选题]化学反应开始时,由于反应物浓度大,正反应速度较逆反应速度()。
A.慢
B.相等
C.快
[单项选择]那种造成19世纪爱尔兰土豆绝收的真菌近来又以一种全新的、危害更大的形式出现了,但是由于其能被现在推广的杀菌剂所消灭,因此不必担心它在目前主要依赖土豆为食的国家里引起大规模食品短缺。
以下哪项,如果为真,最能对上述结论提出质疑
A. 尽管土豆在世界许多地方是重要的农产品,但大多数国家仍以小麦与大米为主食。
B. 这种新型菌所波及的国家无力支付推广杀菌剂之费用。
C. 由于从某主要的土豆出口国进口土豆种时疏忽大意,这种新型菌开始传播。
D. 大多数国家的土豆农除了为其农作物喷洒这种专杀新型菌的杀菌剂外还喷洒其他杀虫剂。
E. 大多数国家都没有专项基金以减轻像严重食品短缺和洪水等的规模灾害的影响。
[不定项选择题]共用题干
第一篇
A meager(不足的)diet may give you health and long life, but it's not much fun一and it might not even be necessary. We may be able to hang on to most of that youthful(有青春活力的)vigor (精力)even if we don't start to diet until old age.
Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation(恢复活力,返老还童) won't reverse other damage caused by time for the mouse,but could help its liver metabolize(使进入新陈代谢过程)drugs or get rid of toxins.
Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old一equivalent to about 70 human years.
The researchers checked the activity of 11,000 genes from the mouse livers,and found that 46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production一probably bad news for mouse health.In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes.But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes.
"This is the first indication that these effects kick in pretty quickly",says Huber Warner from the National Institute on Aging near Washington
D.
C.
No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.
If it does work in people,there might be good reasons for rejuvenating the liver. As we get older,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of dieting,says Spindler,could be enough to make sure a. drug is effective.
But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:I can only eat half of that."
Spindler hopes we soon won't need to diet at all. His company,Lifespan Genetics in California, is looking for drugs that have the effects of calorie restriction.
Why does the author mention an elderly mouse in paragraph 2?
A.To describe the influence of old age on mice.
B.To illustrate the effect of meager food on mice.
C.To tell us how mice's liver genes behave.
D.To inform us of the process of metabolizing drugs.
[单项选择]
The United States (56)
a large part of the North American continent. Its neighbors are
Canada (57) the north, (58) Mexico
to the south. (59) the United States is a big country, it’ s
not the largest in the world. In 1964 its (60) was over
185,000,000. When this land first became a nation, after
(61) independence from England, it had thirteen states,
(62) of the states was represented on the American flag by a
(63) . All the states were in the eastern part of the continent.
As the nation grew towards the west, new states were in the eastern part of the
continent. As the nation grew towards the west, new states were added and new
stars (64) on the flag. For a long time, there were 48
states. In 1959, however, two (65) stars were added to the
flag (66) the new states A. doing B. winning C. giving D. making
[单项选择]全肺切除术后放置胸腔闭式引流的目的是 A. 重建胸腔负压 B. 排出积气 C. 排出积液 D. 调节两侧胸腔压力 E. 便于观察病情
[单选题]掘路施工应做好防止( )的安全措施。 A.触电 B.交通事故 C.火灾 D.坍塌 E.略 F.略
[单项选择]领班查房的数量,不同的饭店有不同的规定,就中档饭店而言,在没有其他工作干扰的情况下,日班领班应负责()间房的工作区域,低档饭店负责80~100间客房。 A. 60~80 B. 40~60 C. 50~70 D. 30~40
[判断题]对经审核存在有效不符点的单据,国际业务部门必须在收到单据后的四个工作日内发出拒付电,否则丧失拒付的权利。 A.正确 B.错误
[单选题]起爆药是引起其他炸药爆炸的炸药,具有感度高、爆速低、威力小、猛度小的特点。下列炸药中属于起爆药的是( )。 A.苦味酸 B.黑火药 C.硝化甘油 D.叠氮化铅
[单项选择]( )由政府土地部门采取招标、拍卖和挂牌方式转让国有土地。 A. 征收方式 B. 出售方式 C. 划拨方式 D. 出让方式
[单项选择]下列岩石都有可能找到化石的一组是() A. 页岩、石灰岩 B. 砾岩、大理岩 C. 砂岩、玄武岩 D. 石英岩、花岗岩
[单选题]‡年1月,张某将商铺出租给甲公司,一次性取得2021年全年租金100万元。就该项业务,张某应缴纳的增值税税额是:( ) A. 5万元 B. 3万元 C. 4.76万元 D. 0
[单选题]自动磨边机磨边时,以下哪条不会造成水嘴不喷水或水量很少,砂轮冒火星:( )。 A.电机损坏 B.电磁阀堵塞或坏掉 C.喷水嘴堵塞 D.进水管未连接好或堵塞
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