热门试题:
[单项选择]短期( )的变化可能会影响其总产出、就业及价格水平的稳定。
A. 出口总额
B. 贸易盈余
C. 贸易赤字
D. 贸易差额
[单项选择]重症肌无力应选用
A. 新斯的明
B. 毛果芸香碱
C. 东莨菪碱
D. 筒箭毒碱
E. 碘解磷定
[单选题]配电线路导线档距内压缩接头的机械强度不应小于导体计算拉断力的( )%。
A.80
B.85
C.90
D.95。
[不定项选择题]共用题干
B1i'k Holes
1 Black holes can be best described as a sort of vacuum,sucking up everything in space. Scientists
have discovered that black holes come from an explosion of huge stars. Stars that are near death can no longer
burn due to loss of fuel , and because its temperature can no longer control the gravitational（重力的）force,
hydrogen ends up putting pressure onto the star' s surface until it suddenly explodes then collapses.
2 Black holes come from stars that are made of hydrogen,other gases and a few metals. When these
explode it can turn into a stellar-mass ( 恒星质量）black hole , which can only occur if the star is large enough
(should be bigger than the sun) for the explosion to break it into pieces,and the gravity starts to compact
every piece into the tiniest particle. Try to see and compare:if a star that' s ten times the size of the sun ends
up being a black hole that' s no longer than 70 kilometers ,then the Earth would become a black hole that' s
only"fraction of an inch!
3 Objects that get sucked in a black hie will always remain there,never to brsak fren. But remember
that black holes can only gobble up（吞噬）objects within a specific distance to it It' s possible for a large
star near the sun to become a black hole,but the sun will continue to stay in place. Orbits (轨道）do not
change because the newly formed black hole, contains exactly the same amount of mass as when it was a star,
only this time its mass is totally contracted that it can end up as on biggeer tnan a state.
4 So far, astronomers have figured out that black holes exist because of Albert Einstenin's theory of
relativity. In the end,through numerous studies ,they have discovered that black holes truly exist. Since black
holes trap light and do not give off light,it is nearly impossible to detect black goles via a telescope. But
astronomers continue to study galaxies (银河系）,space and the solar system to understand how black holes
misht evolve. It is possible that black holes can exist for millions of years,and later contribute to a bigger
process in galaxies ,which can eventually lead to creation of new entities（实体）.Scientists also credit black
holes as helpful in learning how galaxies began to form.
Paragraph 2_____________
A.What Happens to the Objects Around a Black Hole?
B.Is There Proof That Black Holes Really Exist?
C.How Were Black Holes Named?
D.What Are Different Types of Black Holes?
E.What Are Black Holes Made of?
F.How Are Black Holes Formed?
[简答题]交流磁路和直流磁路在电磁关系上有何不同？
[判断题]使用手持电动工具应当注意:辨认铭牌,检查工具或设备的性能是否与使用条件相适应。( )
A.正确
B.错误
[单选题]正线上的出站信号机未开放时，进站信号机不能开放( )信号；主体信号机未开放时，预告信号机不能开放。922000000
A.通过
B.复示
C.预告
D.进站
[单选题]防洪值班人员应()值守。(防洪)
A.24小时
B.48小时
C.6小时
D.12小时
[单选题]在单相普通电子表中以下部件并不是一定需要的：（）。
A.显示器
B.测量模块
C.单片机
D.电源电路
[判断题]同一涉农、扶贫金融服务授信业务工作人员对多户不良贷款承担责任的，应逐笔问责。
A.正确
B.错误
[简答题] Acculturation (儿童的开化), which begins at birth, is the process of teaching new (47)______ of children the (48)______ and values of the parents’’ culture. How people (49)______ newborns, for example, can be indicative of cultural values. In the United States it is not uncommon for parents to put a newborn in a separate room that (50)______ only to the child. This helps to preserve parents’’ (51)______ and allows the child to get used to having his or her own room, which is seen as a first step toward personal independence. Americans (52)______ have held independence and a closely-related value, individualism, in high esteem (尊重). Parents try to instill these prevailing values in their children. American English expresses these value (53)______: children should "cut the (umbilical) cord" and are encouraged not to be "tied to their mothers’’ apron strings." In the process of their socialization children learn to "look out for number one" and to "stand on their own two feet."
Many c
[多选题]借款人申请金信优E贷需提供（ ）
A.身份证
B.工作证明
C.收入证明
D.其他材料
[单项选择]多重选择性问题的提问方式是（）。
A. 你为什么失约
B. 你有什么感觉，是沮丧还是生气
C. 您只谈学习，可当今的教师水平和学校纪律是什么情况
D. 这件事你凭什么那么肯定
[单项选择]下列组合，错误的是
A. 保护剂——防止显影剂氧化
B. 保护剂——防止照片污染
C. 促进剂——稳定显影液pH值
D. 促进剂——促进显影剂的电离
E. 促进剂——促使乳剂层收缩
[单选题]长度和横截面面积均相同的两杆，一个为钢杆，另一个为铝杆，在相同的轴向拉力作用下，两杆的应力与变形有四种情况，正确答案为（ ）。
A.铝杆的应力和钢杆相同，变形大于钢杆
B.铝杆的应力和钢杆相同，变形小于钢杆
C.铝杆的应力和变形均大于钢杆
D.铝杆的应力和变形均小于钢杆
[判断题]由汽油机驱动的消防排烟机称为汽油机式消防排烟机,是内燃机式排烟机的一种。(易)( )
A.正确
B.错误
[单选题]当人员因触电需要进行心肺复苏时，胸外按压为每分钟（）次。
A.70-90
B.80-100
C.90-110
D.100-120
[判断题]把作业场所和工作岗位存在的危险因素如实告知从业人员,会有负面影响,引起恐慌,增加思想负担,不利于安全生产。( )
A.正确
B.错误
[多选题]行政机关的下列哪些行为符合法定的调查程序 ( )
A.某市工商局派出三名执法人员对超市进行调查
B.某市环保部门采取抽样取证的方法收集印刷厂排污超标的证据
C.某市安监局在进行调查前向当事人出示证件
D.某市卫生行政部门在对证据先行保存后的第10日作出了处理决定
[单选题]北京颐和园内的谐趣园、圆明园内的廓然大公（后来也称双鹤斋）均为仿(）而建
A.拙政园
B.豫园
C.寄畅园
D.个园
[单选题]患者，男，50岁，初诊20123，临床表现为身热汗多，心烦渴，小便短赤，体倦少气，精神不振，脉虚数，其病因为
A.风邪
B.寒邪
C.暑邪
D.燥邪
E.火邪
[单项选择]检查备用刹车系统的有效性时，同时踩两边蹋板到底，压力必须为（）
A. 1000---1500PSI
B. 1500---2000PSI
C. 2000---2700PSI
[填空题]在室外高压设备上工作，工作地点四周围栏上悬挂适当数量的“止步，高压危险！”标示牌，标示牌必须朝向围栏（）。
[多选题]依据《广西电网有限责任公司网络安全（运行）事件调查规程》（Q/CSG-GXPG213001-2020）规定：5.4.1.3 为进一步杜绝（ ）、（ ）、（ ）等屡禁不止的违反合规性要求的问题，本细则特别定义此类问题为恶性违规违章操作，参照运行事件1级、运行事件2级开展考核，如果造成严重后果和影响的，按网络安全事件予以定级。
A.非法跨区互联
B.默认账号
C.弱口令
D.木马病毒
[判断题](判断题).青皮行气力强,破气散结,可用于治胸胁胀痛。
A.正确
B.错误
[单选题]刀具磨纯标准通常都按()的磨损值来制订。
A.月牙洼深度
B..前刀面
C.后刀面
D.刀尖
[单项选择]项目目标（）是绩效考核的核心指标，考核单位应以投资项目可行性研究报告和初步（施工图）设计的主要经济指标为基础，按照股份公司精细化管理的要求确定。
A. 利润
B. 建设进度
C. 投资
D. 成本
[多项选择]水泥的质量标准有( )。
A. 细度
B. 含泥量
C. 胶结程度
D. 体积安定性
E. 强度
[判断题]起吊重要设备、精密物件或在复杂场所进行大件吊装前,应制定专门的安全技术措施。
A.正确
B.错误
[单项选择]下列有关受众调查的陈述不正确的是（）。
A. 受众调查是社会调查中的一种
B. 受众调查的方式分为直接调查和间接调查
C. 在网站的受众调查中，以直接调查为主（以间接为主）
D. 问卷调查是最常见的间接调查
[判断题] 在微量元素中锌对创伤愈合有重要作用，手术后伤口愈合迟缓的病人，皮肤中锌的含量大多比愈合良好的病人低，因此补给锌能促进愈合。( )
A.正确
B.错误
[单选题]下列关于成本加成定价法中，成本基数的计算中说法正确的有（ ）。
A. 完全成本加成定价法的成本基数包括直接材料、直接人工，制造费用和销售及管理费用
B. 完全成本加成定价法的成本基数包括直接材料、直接人工和制造费用及管理费用
C. 变动成本加成定价法的成本基数包括直接材料、直接人工和变动制造费用
D. 变动成本加成定价法的成本基数包括直接材料、直接人工、变动制造费用和变动销售及管理费用
[单选题]共轴式直升机废阻面积一般大于单旋翼直升机，这是因为：
A.共轴式直升机的纵向尺寸较大
B.其结构重量与载重均集中在重心附近
C.其特殊的操作系统要求两旋翼之间保持一定距离
