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[单选题]检修BY-2型逆变器,其0.022μF涤纶电容应先用( )直流电源进行耐压试验,然后再用电容进行容量检查。
A.(A)110V
B.(B)220V
C.(C)800V
D.(D)1200V

热门试题:

[单项选择]在防止氢腐蚀的方法的叙述中,错误的是()。
A. 采用有效的合金化元素,使金属表面形成致密的保护膜
B. 在气态氢环境中加入适量氧
C. 采用烘烤方法去氢
D. 在金属表面刷漆
[判断题]集团公司供应商目录信息数据实行总公司统一管理和分级维护管理的原则。
A.正确
B.错误
[单项选择]下列关于汉字字符集及其编码的叙述,错误的是 ( )
A. 在计算机内,—个汉字用两个字节存储
B. 表示汉字内码的两个字节的最高位都是1
C. 为适应应用繁体字的需要,国家还制定了繁体字字符集(GB 12345-1990),它所包含的图形符号及汉字数量与GB-2312-1980相同
D. 我国目前汉字编码字符集除了GB-2312-1980基本集外,还有两个扩允的汉字字符集
[单选题]下列不属于接口WindowListener的方法是:
A.windowClosing()
B.windowClosed()
C.windowMinimized()
D.windowopened()
[论述题]如何确保微机联锁系统的故障-安全性能?
[单选题](2分)单选题

关于血液一般检查的选择和应用,错误的是
A. 是所有入院病人必做的检查
B. 诊断贫血最常用的检查是红细胞及血红蛋白检测
C. 术前准备主要选择白细胞及血小板检测
D. 观察骨髓移植效果主要选择白细胞检测
E. 各种发热病人必须做白细胞检测
[填空题]电秒表是精密()测量仪器,用于测量任何动态的连续时间。
[单项选择]贝尔面瘫与中枢性面瘫相鉴别的重要临床表现是
A. 眼睑闭合不全
B. 额纹消失,不能蹙眉
C. 口角偏斜
D. 鼓腮不能
E. 鼻唇沟消失
[多选题]货场内的委托装卸实行统一管理、( )的“五统一”管理。
A.统一派班
B.统一费率
C.统一收费
D.统一清算
[简答题]旅客客车每车配备( )只2kgABC干粉灭火器。
[单项选择]根据刑法的规定,破坏交通工具罪的法定对象有()
A. 火车、汽车、电车、拖拉机
B. 汽车、电车、船只、摩托车
C. 电车、船只、航空器、火车轨道
D. 船只、航空器、火车、汽车、电车
[单选题]"神华八轴交流机车OCE灯显1A灯.( )闪烁,2A灯.3A灯常亮,表示OCE工作正常;若灯显全灭或2A.3A灯灭,表面OCE工作不正常。
A.2A
B.3A
C.4A"
[简答题]简述我国《野生植物保护条例》有关野生植物生长环境保护措施的规定。
[单项选择]集体领导和个人负责制在政府领域的集中体现是()。
A. 委员会制
B. 行政首长负责制
C. 领导班子分工负责制
D. 领导班子集体负责制
[单项选择]FIDIC合同条件规定,业主的工程进度款付款时间应在( )内。
A. 工程师开具支付证书后28天
B. 工程师开具支付证书后56天
C. 工程师收到月进度付款申请单后56天
D. 工程师计量后28天
[判断题]元朝建立了世界帝国的雏形
[填空题]在窗体中使用一个文本框(名为num)接收输入值,有一个命令按钮run,单击事件代码如下。
Private Sub run_Click( )
If Me!num>=60 Then
result="及格"
ElseIf Me!num>=70 Then
result="中等"
ElseIf Me!num>=85 Then
result="优秀"
End If
MsgBox result
End Sub
打开窗体后,若在文本框中输入的值为85,单击命令按钮,输出的结果是______。
[单选题]闸瓦磨损开关接在TKD电控系统的()回路中。
A.测速回路
B.调速回路
C.安全回路
D.转子回路
[判断题]Do you have a Chinese visa 应译为:你有没有中国护照?( )
A.正确
B.错误
[单项选择]下列有关肝炎病毒标志物检查的叙述,错误的是()
A. 抗HAVIgM阳性可诊断为HAV近期感染
B. HBsAg和HDAg均呈阳性,可诊断为HDV及HBV现症感染
C. 抗HBs阳性可诊断为HBV现症感染
D. HCVRNA阳性可诊断为HCV现症感染
E. 抗HEVIgM阳性可诊断为HEV近期感染
[单项选择]下列( )人员负责规定会计软件系统各类使用人员的操作权限。
A. 系统维护员
B. 系统操作员
C. 软件编程人员
D. 电算主管
[单项选择]十二经脉气血流注,周而复始,如环无端。其流注交接有一定次序。十四经流注,是在十二经脉流注的基础上,再加上:()。
A. 冲、任 
B. 督、带
C. 督、任
D. 阴阳维脉
E. 阴阳跷脉
[多项选择]患者男,28岁。主因上腹痛伴皮肤巩膜黄染1d入院,伴皮肤瘙痒、尿色深染及陶土样便。年少时有呕吐蛔虫及反复上腹痛病史。为明确诊断应重点紧急检查的项目包括(提示T38.1℃,P106次/min,R20次/min,BP120/80mmHg。皮肤巩膜明显黄染,腹部平坦,上腹部轻压痛,无肌紧张或反跳痛。)()。
A. 血常规
B. 尿常规
C. 血清淀粉酶
D. B超
E. 腹部X线片
F. 纤维十二指肠镜
[单项选择]You are loading a cargo tank on your container ship. The tank displays the red label shown. Which statement is TRUE? ()
A. The tank contains propylene
B. The tank's volume is 1077 cubic feet
C. There are three tanks in the shipment
D. The tank contains an oxidizing material
[简答题]背景说明:你是宏远公司行政秘书钟苗,下面是行政经理苏明需要你完成的几项任务。便条 钟苗: 下周公司将来一位新秘书,请你根据自己这两年办公用品库存保管的经验,就以下两个问题形成书面材料,交给她参考。 办公用品库存保管中应采取哪些有效措施 办公用品的发放手续是怎样的 谢谢。 行政经理苏明
[单项选择]在我国,银行业金融机构的设立要经过()批准。
A. 中国银行业监督管理委员会
B. 中国银行业协会
C. 财政部
D. 中国人民银行
[不定项选择题]共用题干 Teaching Math,Teaching Anxiety
In a new study about the way kids learn math in elementary school,the psychologists at the University of Chicago Sian Beilock and Susan Levine found a surprising relationship be-tween what female teachers think and what female students learn:If a female teacher is un-comfortable with her own math skills,then her female students are more likely to believe that boys are better than girls at math.
If these girls keep getting math-anxious female teachers in later grades,it may create a snowball effect on their math achievement said Levine. In other words,girls may end up learning math anxiety from their teachers. The study suggests that if these girls grow up be-lieving that boys are better at math than girls are,then these girls may not do as well as they would have if they were more confident.
Just as students find certain subjects to be difficult,teachers can find certain subjects to be difficult to learn一and teach. The subject of math can be particularly difficult for every-one. Researchers use the word“anxiety”to describe such feelings:anxiety is uneasiness or worry.
The new study found that when a teacher has anxiety about math,that feeling can influ-
ence how her female students feel about math. The study involved 65 girls,52 boys and 17 first-and second-grade teachers in elementary schools in the Midwest. The students took math achievement tests at the beginning and end of the school year,and the researchers com-pared the scores.
The researchers also gave the students tests to tell whether the students believed that a math superstar had to be a boy. Then the researchers turned to the teachers:To find out
which teachers were anxious about math,the researchers asked the teachers how they felt at times when they came across math,such as when reading a sales receipt. A teacher who got nervous looking at the numbers on a sales receipt,for example, was probably anxious about math.
Boys,on average,were unaffected by a teacher's anxiety. On average,girls with math-anxious teachers scored lower on the end-of-the-year math tests than other girls in the study
did. Plus,on the test showing whether someone thought a math superstar had to be a boy,20 girls showed feeling that boys would be better at math一and all of these girls had been taught by female teachers who had math anxiety.
“This is an interesting study,but the results need to be interpreted as preliminary and in need of replication with a larger sample,”said David Geary,a psychologist at the University of Missouri in Columbia. According to the experiment,those teachers were probably anxious about math when they felt______.
A.nervous memorizing the numbers of a sales receipt
B.helpless saving the numbers of a sales receipt
C.uneasy reading the numbers of a sales receipt
D.hopeless filling in the numbers of a sales report
[单选题]《铁路旅客运输服务质量规范》(铁总运〔2016〕247号)规定,站台、天桥及进出站地道照明照度不低于()勒克斯。
A.200
B.150
C.100
D.50
[单项选择]用抽象的概念和理论来解决问题的思维,属于()。
A. 抽象思维
B. 动作思维
C. 间接思维
D. 形象思维
[填空题]‐年5月1日至10月31日期间,第41届世界博览会在中国上海举行。此次世博会也是由中国举办的首届世界博览会。上海世博会以“( )”为主题。
[填空题]仓储业务活动主要内容是物资的接运、()、()、()等基本环节。
[判断题][T]BB032 5 3 5
固井完井设计的主要目的是保护和支撑油气井内的套管,封隔油、气和水等地层。( )
A.正确
B.错误
[多选题]以下符合消防员登车要求的是( )。 ( )
A.必须按照指定位置乘车
B.严禁在车外、车顶搭乘
C.严禁在车辆起步后追赶登车
D.严禁边跑动边着装
[单选题]认领拾遗物品时,由认领人提供拾遗物品名称、_______、遗失时间,车站通过《车站拾遗物品登记表》确认是否有相符物品。
A.物品描述
B.遗失地点
C.遗失数量
D.身份证件
[判断题]设备状态量:直接或间接表征设备状态的各类信息,如数据、声音、图像、现象等。
A.正确
B.错误
[单项选择]

Text
The Spring Festival is (9) . As a tradition, people are (10) to have something new to use or wear, (11) children, no matter they are rich or poor. Therefore, you can see many families going shopping on the streets. And, interestingly enough, you may notice that men’ s shopping style is different (12) that of women.
Let’ s look at men’ s clothes shops: A man comes into a shop, has a (13) at the whole shop and goes to his (14) area. He has a (15) look of the colors and begins to ask the shop assistant for the fight size. He tries it on, (16) his arms or kicking his (17) to check if it is (18) enough. The clothing (19) him and he asks for a plastic bag. He pays the money, puts the new dress in the bag and leaves the shop. The (20) is done in only a few minutes. If the dress is sold in package, he doesn’t want to be (21) to unpack it. So, yo
A. needed 
B. opposed 
C. supposed 
D. supported

[单项选择]易复发可恶变的颌骨囊肿是
A. 根端囊肿
B. 始基囊肿
C. 含牙囊肿
D. 角化囊肿
E. 外渗性囊肿
[判断题]无线列调系统将移动台向基地台的通信方向定义为上行方向。
A.正确
B.错误

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