题目详情
题目详情:

[单项选择]在进行随机抽样中,下列哪项是正确的()
A. 研究者随意挑选个体,使样本更符合研究内容
B. 按随机的原则抽取,使总体中的每一个个体都有同等的机会被抽取
C. 随机抽取的样本数越大越好
D. 用随机的方法进行抽样,虽然有理论依据,但不可以计算抽样误差
E. 以上均不对

热门试题:

[单选题]四川省人民政府防汛抗旱指挥部.四川省交通厅在《关于防汛指挥与免交公路车辆通行费有 关事项的通知》(川交函[2008
473 号)中明确指出,我省汛期为每年( )。
A.3 月 15 日至 10 月 1 日
B.4 月 1 日至 9 月 30 日
C.5 月 1 日至 9 月 30 日
D.5 月 1 日至 11 月 1 日
E.3 月 1 日至 9 月 30 日
[单项选择] 作用趋向偏于升浮的药物是( )
A. 化痰药
B. 开窍药
C. 补阳药
D. 利水通淋药
E. 涌吐药
[多选题]"下列物质不属于D类火灾的有( )。
A.纤维板
B.合成橡胶
C.氢气
D.钠"
[判断题]优先股股东有经营管理权。
A.正确
B.错误
[单选题]应当组织开展重点职业病监测和专项调查,对职业健康风险进行评估,为制定职业卫生标准和职业病防治政策提供科学依据的为()。
A.国务院劳动保障行政部门
B.国务院卫生行政部门
C.国家安全生产监督管理部门
[多选题]发展社会主义民主政治就是要( ),用制度体系保证人民当家作主。
A.体现人民意志
B.保障人民权益
C.激发人民创造活力
D.做到每个人都有发言权
[单项选择]

Most men and more than half of the women in North America work. In fact, many people who are lazy and don’t work for a living are looked down upon, such as people who have got a fortune from their parents, or those who receive money from the government when they are young enough to take a job.
Americans usually are expected to work hard at their regular jobs. They have believed that they felt shameful if they did not work as hard and carefully as they could, and God would punish those who were careless or lazy in their work. This is called the "work ethic". Its roots are in the Bible’s teachings: "If a man will not work, he shall not eat." and "Do not work to please men, but just please God." For 400 years or more, it has been a characteristic of Americans. Historians say that this "work ethic" was perhaps the single most important reason for the rapid economic growth and continuing success of the United States.

A. People who have got a big fortune from parents
B. Young people who receive money from the government
C. Women who choose to stay as homemakers
D. Employees who are lazy at work

[多选题]安全生产中从业人员的义务是( )。
A.遵守本单位的安全生产规章制度和安全操作规程.服从管理.正确佩带和使用劳动防护用品
B.接受安全生产教育和培训
C.及时报告事故隐患和不安全因素
D.缴纳工伤社会保险费用
[判断题]根据《普速铁路接触网运行维修规则》(铁总运〔2017〕9号)规定:吸上线与扼流变压器连接时,连接钣(端子)由电务段负责,连接钣(端子)上的螺栓和吸上线由工务段负责。
A.正确
B.错误
[判断题]半轴的作用是将差速器的扭矩传递给驱动轮。
A.正确
B.错误
[单项选择]DL/T438-2009《火力发电厂金属技术监督规程》中的规定,工作温度高于450℃的锅炉出口、汽轮机进口的导汽管,根据不同的机组型号在运行()时间范围内,进行外观质量和无损检验,以后检验周期约5万h。
A. 3~5万h
B. 5万~10万h
C. 10万h以上
[不定项选择题]共用题干 London Cabbies(出租车司机)

Every city in the world has taxis to take tourists to interesting places.London is the only
city in the world where taking a taxi is an_________(1)experience for tourists.This is
partly because of the special black cabs,which are found in no other country.But it is also
because of the drivers themselves.__________(2)British people are famous for being
polite and reserved,London cabbies are well-known_______(3)their willingness to
talk.
Some customers say that once the door shuts and the cab________(4)off they are
a captive(监禁了的)audience. It is impossible to get the taxi driver to stop _________ (5).
"They're self-confident and free thinking,"said Malcolm Linskey,the author of a history of
taxi drivers in London.
They are also expensive.London has the most expensive taxis of any city in the world
except Tokyo.That's why Ken Livingstone,the Mayor of London,is planning to make taxi
drivers negotiate their fares with_________(6)before they take a ride.
Drivers agree that their fares are expensive. That's because their black taxis_______(7)
more than other cars,they say.And the customer is also paying for more driving expertise
(专门知识) than anywhere else in the world.
Before someone can qualify as a London taxi driver,that person has to pass a test
_________(8)simply as"The Knowledge".This involves________(9)the name and
location of every street within six miles of a point in the exact centre of London.The trainee
(受训者)must also learn the exact location of every important building within these streets.
Finally he or she must be able to use this knowledge to work out the________(10)
distance between any two destinations within this area.
It can________(11)up to three years to pass"The Knowledge".Every day it is
possible to see trainee taxi drivers on the streets of London,taking careful notes of popular
destinations before tracing the route to their next stop. Cab driving is a job often_______
(12)down in families.Many taxi drivers take their children out in their spare time to
memorize_________(13)they need to know when it is their turn to do"The Knowledge".
London cabbies also have bigger brains.Recent research found that the part of the
brain that remembers things was larger and more________(14)in cab drivers.They
have to fit the whole of London into their heads,so their brains grow bigger.So perhaps it is
not__________(15)that taxi drivers have lots to say. _________(6)
A.customers
B.hosts
C.guests
D.bosses
[单选题]()分别安装在上臂一端和底架上,用于调整最大升弓高度和滑板运动轨迹。( )
A.阻尼器
B.弹簧
C.上导杆
D.下导杆
[判断题]n型电气设备的检查项目不包括电气设备结构的检查。
A.正确
B.错误
[多选题]经济基础对上层建筑的决定作用 , 主要表现在 ( )
A.经济基础决定上层建筑是否包括自然科学
B.经济基础决定上层建筑是否具有反作用
C.经济基础决定上层建筑的性质
D.经济基础决定上层建筑的产生、变化与发展
[单选题]市政府把省政府的文件以通知的形式发至县政府,这种形式叫作( )。
A.印发
B.批转
C.翻印
D.转发
[单选题] 对设备的动力性、经济性和可靠性的全面恢复,是指对设备进行()。
A.总成大修
B.大修
C.小修
D.零件修理
[单选题]焊接热输入对焊件产生变形的影响是( )。
A.焊接热输入越大,变形越小
B.焊接热输入越小,变形越大
C.焊接热输入越小,变形越小
D.没有影响
[多选题]塔机液压系统应有( )的安全装置。
A. 防止泄露
B. 防止过载
C. 防止液压冲击
D. 防止油温升高
[单选题]下列关于行政处罚中“一事不再罚原则”的表述哪个是正确的?( )
A.一个违法行为不能进行多种行政处罚
B.两个行政机关分别依据不同的法律规范给予当事人两个罚款的处罚
C.行政机关不得以同一事实和同一依据,对当事人的同一个违法行为给予两次的行政处罚
D.一个违法行为,多个处罚主体不能根据不同的法律规范作出不同种类的处罚
[单项选择]治疗肺痈,肠痈,肠燥便秘,咳嗽气喘,应选用的药物是()
A. 丹参
B. 桃仁
C. 红花
D. 赤芍
E. 益母草
[单选题]滋养肺肾法称
A.益火补土
B.金水相生
C.培土生金
D.抑木扶土
[单项选择]脂肪变性常见于
A. 肺
B. 肝
C. 脾
D. 脑
E. 脂肪组织
[单选题]JP7,JP9端子应( )短接
A.
B.左右
C.上下
D.不用
E.前后
F.略
G.略
H.略
[单选题]RM80清筛车转向架轴距为()。
A.1730mm
B.1830mm
C.1930mm
D.2030mm
[单项选择]1945年,当爱因斯坦得知美国的原子弹给广岛、长崎人民带来的灾难后,痛心疾首,悔恨自己当初的一大理论研究。这一理论是()
A. 落体定律
B. 量子假说的提出
C. 经典力学的创立
D. 相对论中质能转换的原理
[判断题]使用python操作mongodb时,需要先通过pip install pymongo进行安装。( )
A.正确
B.错误
[单选题]无齿锯应符合砂轮工作的各项规定。使用时操作人员应站在锯片的( ),锯片应缓慢地靠近被锯物件,不准用力过猛。
A.侧面
B.正面
C.前面
D.后面
[单项选择]某企业非正常损失材料100公斤,单价为200元,购货增值税专用发票上注明的增值税为3400元,在经批准前,以下账务处理正确的是( )。
A. 借:待处理财产损溢——待处理流动资产损溢 20000
B. 借:原材料 20000
C. 借:待处理财产损溢——待处理流动资产损溢 23400
D. 借:待处理财产损溢一待处理流动资产损溢 23400
[不定项选择题]具有补脾止泻,养心安神功效的药物是(  )。
A.山茱萸
B.五倍子
C.莲子
D.诃子
E.金樱子
[填空题]《上海通信段安全管理实施细则》规定,现场作业人员必须听从()的统一指挥。
[单项选择]下列糖品不影响血糖浓度变化的是()
A. 白砂糖
B. 淀粉糖浆
C. 蜂蜜
D. 木糖
[多项选择]肺癌患者可出现
A. 心律失常
B. 声音嘶哑
C. 吞咽困难
D. 男性乳房肥大
E. 重症肌无力
[判断题]生产中废品及返工品产生的损失都通过“废品损失”账户来核算。()
A.正确
B.错误
[判断题]疾病的一级预防又称病因预防。
A.正确
B.错误
[多选题]车辆中心检修车间日计划应包含的内容有()
A.运营车
B.检修车
C.专项作业
D.作业班组及轨道
E.和检修相关的施工信息

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