热门试题:
[单选题](6144)当下图所示阀芯位于中间位时,其中位机能为( )。
A.P型
B.C型
C.O型
D.M型
[判断题] ( )牛奶中蛋白质主要是酪蛋白,为全价蛋白质,含有人体必需的8种氨基酸,是优质的氨基酸供给源。
A.正确
B.错误
[简答题]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 mass 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.
Air: the World Health Organization (WHO) says three million people are killed worldwide by outdoor air pollution annually from vehicles and industrial emissions, and 1.6 million indoors through using solid fuel. Most are in poor countries.
Water: diseases carried in water are responsible for 80% of illnesse
[多项选择]随着储能新材料的不断创新发展，在储能元件（）等方面有望取得重要突破。
A. 电池使用寿命大幅提高
B. 能量密度显著提升
C. 充电时间大大缩短
D. 电池成本大幅降低
[单选题]不需要办理许可手续的配电第二种工作票，由工作负责人向提出工作许可人（运维负责人）申请，得到同意后给予办理。
A.正确
B.错误
C.略
D.略
E.略
F.略
[多选题]过电压保护器采用了(??)保护器的安全得到了可靠保证,寿命大为延长。
A.间隙
B.无间隙
C.有续流
D.无续流
[判断题] ( )新氢压缩机吸气阀温度偏高,说明气阀有可能已经损坏。
A.正确
B.错误
[单选题]在网站办理铁路电子客票购票、改签、退票时，不能晚于开车前（ ）小时。
A.1
B.2
C.8
D.24
[填空题]构支架吊装作业，吊件离地面约（ ）mm时，应停止起吊，全面检查确认无问题后，方可继续，起吊应平稳。
[单选题]国民政府以“非法团体”为罪名，首先强令解散的民主党派是( )。
A.民主同盟
B.民主建国会
C.农工民主党
D.民主促进会
[判断题]少年儿童处于身体素质发展的敏感期，因此要全力挖掘他们的竞技潜力。( )
[单选题]地面GSM-R设备发生故障，影响车站值班员( )与司机之间通话时，可使用450MHz列车无线调度通信设备通话。
A.列车调度员
B.车站调度员
C.调车区长
D.助理值班员
[单项选择]能够提高牛奶中含氮量的是（）
A. 塑化剂
B. 三聚氰胺
C. 亚硝酸
D. 福尔马林
[单项选择]我国经济体制改革的中心环节是：
A. 加强宏观调控
B. 国企改革
C. 培育市场体系
D. 健全社会保障制度
[单选题]承担中央和省级人民政府专项储备任务和宏观调控任务的客户，最高可评定为（?）级。
A.AAA
B.AA
C.A
D.AA+
[填空题]装载军事装备时，车辆头部可以伸入火炮炮管下面，与炮管下沿的垂直距离，车辆与火炮装于同一平车时，不得小于（）mm。
[多选题]灰卡的解灰方式有( )
A.本机解灰
B.本站解灰
C.异站解灰
D.发卡网点解灰
[单项选择]下列不是音频文件的是 ( )
A. WAV
B. MP3
C. MID
D. AVI
[单选题]属于裱糊类墙体饰面的是（ ）。
A.抹灰饰面
B.刷浆饰面
C.壁纸饰面
D.木质饰面
[单项选择]Auctions are public sales of goods, conducted by an officially approved auctioneer. He asked the crowd to gather in the auction room to bid for various items on sale. He encourages buyers to bid higher figures and finally names the highest bidder as the buyer of the goods. This is called "knocking down" the goods, for the bidding ends when the auctioneer bangs a small hammer on a raised platform.
The ancient Romans probably invented sales by auction and the English word comes from the Latin "autic", meaning "increase". The Romans usually sold in this way the spoils taken in war; these sales were called "sub hasta", meaning "under the spear", a spear being stuck in the ground as a signal for a crowd to gather. In England in the eighteenth and nineteenth centuries goods were often sold "by the candle"; a short candle was lit by the auctioneer and bids could be made while it was burning.
Practically all goods can be sold by auction. Among these are coffee, skins, wool, tea,
A. for the highest price offered.
B. at fixed prices.
C. at prices lower than their true value.
D. at prices offered by the auctioneer.
[多选题]在2021年全国游泳冠军赛暨东京奥运会选拔赛中,( )在男子200米仰泳和男子200米个人混合泳比赛中各自实现“九连冠”壮举
A. 徐嘉余
B. 汪顺
C. 徐红
D. 汪顺余
[判断题]对比试块是一种专用的标准试块。（ ）
A.正确
B.错误
[单选题]高处作业时，电焊机及其他焊割设备与高处焊割作业点的下部地面保持( )以上的间隔，并应设监护人。
A.3m
B.5m
C.10m
D.15m
[多选题]遇有( )的,航空货物、航空邮件应当重新通过民航货邮安检设备检查。
A.图像判读认为可疑,无法确认安全的物品
B.图像不全、变形影响判读或者过检后无图像
C.开箱包检查后无法排除疑点
D.设备在检查过程中突然断电、故障
[单选题]管材的热膨胀量与温度变化幅度及管段长度有关,而与( )大小无关。
A.管段
B.压力
C.管径
D.壁厚
[单选题]17号钩尾销检修时其长度不得少于（ ）。
A.300mm
B.299.5mm
C.303.5mm
D.307.5mm
[判断题]北宋宝元元年（1038年），党项族首领李元昊以宁夏为中心，建立大夏国，史称西夏。( )
A.正确
B.错误
[多项选择]某工程设置了一道重力式挡土墙，该处土质松软，挡土墙基础埋深0.5m，墙后有一道山坡。施工过程中，挡土墙倒塌，引起土方边坡的坍塌。下列事故发生的原因的分析正确的有（）。
A. 没按土质基础一般埋深为1.0-1.2m规定此挡土墙基础埋置太浅
B. 挡土墙埋置过深
C. 山坡一边对挡土墙的压力过大挡土墙失稳
D. 没有进行安全技术交底
[单项选择]-- How will she behave in case of our failure
--She' ll put the blame on us if it （）badly.
A. turns up
B. turns down
C. turns off
D. turns out
[多项选择]各国风俗习惯千差万别，大部分国家以摇头表示否定，以点头表示肯定，而阿尔巴尼亚人则以摇头表示肯定，以点头表示否定。绝大部分行握手礼的国家都伸出右手，但印度却相反，如果要握手必须用左手。许多非洲国家有的以啃咬来宾的右耳垂来表示热烈欢迎，甚至少数国家还有以箭毒涂在来宾的手背上来表示欢迎的礼仪。这些都说明
A. 文化的多样性以统一性为基础
B. 文化的统一性以多样性为前提
C. 文化多样性本质上是人们风俗习惯多样化
D. 文化统一性在于它具有客观性、可解释性和可转换性
[单选题]安全生产子系统操作票模块中，对操作票业务流程描述正确的是（）。
A.填写操作票—初审操作票—复审操作票—归档操作票
B.填写操作票—初审操作票—归档操作票
C.填写操作票—复审操作票—归档操作票
D.填写操作票—执行操作票—归档操作票
[简答题]
Man first appeared on earth half a million years ago. Then he was little more than an animal; but early man had several big advantages over the animals. He had a large brain, he had an upright body, he had clever hands; and he had in his brain special groups of nerve cells, not present in animals, that enabled him to invent a language and use it to communicate with his fellow men. 46) This ability to speak was of great value because it allowed men to share ideas and to plan together, so that tasks impossible for a single person could be successfully undertaken by intelligent team-work. Speech also enabled ideas to be passed on from generation to generation so that the stock of human knowledge slowly increased.
It was these special advantages that put men far ahead of other living creatures in the struggle for existence. They can use their intelligence against their difficulties and master them.
Since these far-off times, when he first appeared, man has achi
[判断题]不论瓦斯气体组分含量是否超过注意值,都应与历史数据比较。( )
A.正确
B.错误
[多选题]调度操作指令可分为（）。
A.综合令
B.多站令
C.逐项令
D.单站令
[单选题]《安全生产法》所指的危险物品包括( )。
A.易燃易爆物品、危险化学品、放射性物品型机械设备
B.枪支弹药
C.高压气瓶、手持电动工具
D.大型机械设备
