统计抽样理论中的大样本是指样本的个数（）。-我要搜题网

[单项选择]In 2005 Japan made a new robot. It can take care of a child. The new robot is called iPapero. It weighs 13.2 pounds, and has a body of 15.2 by 10.3 and by 9.8 inches.
iPapero is a small robot, but it has many special skills. It can recognize and remember up to ten faces and use its eight separate(分开的) electronic ears to understand human voices even in noisy situations(情形). It also plays games with children when they are unhappy, or sing songs or ask quizzes to entertain (使快乐) the child. If the child is bored, iPapero will change new songs and quizzes (猜谜) so that it doesn’t repeat itself. The robot babysitter even has a cell phone to call a parent when the child asks for his mother.
One of the robot’s special skills is ______.
A. it can recognize ten faces and remember some of them
B. it can recognize ten faces and can’t remember them at one time
C. it can recognize and remember ten faces at one time

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[判断题]检修联络用的断路器（开关）、隔离开关（刀闸），应在其来电侧验电。
A.正确
B.错误

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[单项选择]（）应加强对网络预约出租汽车驾驶员资质审核、证件核发工作，监督促进教育培训落实到位。
A. 交通运管部门
B. 公安交通部门
C. 工商管理部门

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[单选题]1.179.第179题
根据DL/T448-2016，三相四线制接线的电能计量装置，其3台电流互感器二次绕组与电能表之间应采用（）线连接。
A.三线
B.四线
C.五线
D.六线

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[简答题]为什么说焊缝探伤扫查速度不宜过快？

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[单项选择]采用( )技术，既可以防止事故的发生，也可以防止事故的扩大，减少事故的损失。
A. 隔离
B. 设置薄弱环节
C. 故障—安全设计
D. 应急救援

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[判断题]进站信号机采用8.5米的信号机柱
A.正确
B.错误

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[判断题]新参加电气工作的人员、实习人员和临时参加劳动的人员(管理人员、非全日制用工等)，应经过岗位技能培训后，可在现场单独从事简单工作
A.正确
B.错误

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[填空题]Questions 61-67 are based on the following passage.
Sports is one of the world’s largest industries, and most athletes are professionals who are paid for their efforts. Because an athlete succeeds by achievement only--not by economic background or family connections--sports can be a fast route to wealth, and many athletes play more for money than for love.
This has not always been true. In the ancient Olympics the winner got only a wreath of leaves (花冠). Even though the winners became national heroes, the games remained amateur for centuries. Athletes won fame, but no money. As time passed, however, the contests become increasingly less amateur and cities began to hire athletes to represent them. By the fourth century A.D., the Olympics were ruined, and they were soon ended.
In 1896, the Olympic Games were revived with same goal of pure amateur competition. The rules bar athletes who have ever received a $50 prize or an athlete scholars or who have

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[单选题]老年人服用降压药最佳的时间为
A.6:00时、13:00时、19:00时
B.7:00时、13:00时、20:00时
C.8:00时、15:00时、20:00时
D.7:00时、15:00时、19:00时
E.7:00时、13:00时、21:00时

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[填空题]严禁扒乘运行中的___，以车代步。

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[多项选择]哪种绦虫的虫卵排出时即对人体具有感染性
A. 微小膜壳绦虫
B. 细粒棘球绦虫
C. 牛带绦虫
D. 猪带绦虫
E. 曼氏迭宫绦虫

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[单项选择]《中国药典》(2010年版)规定，布洛芬缓释胶囊检查
A. 溶出度
B. 释放度
C. 含量均匀度
D. 有关物质
E. 游离水杨酸

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[单项选择]统计抽样理论中的大样本是指样本的个数（）。
A. n≧20
B. n≧30
C. n≧40
D. n≧50

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[单项选择]统计抽样理论中的大样本是指样本的个数（）。A. n≧20B. n≧30C. n≧40D. n≧50

热门试题:

[单项选择]统计抽样理论中的大样本是指样本的个数（）。
A. n≧20
B. n≧30
C. n≧40
D. n≧50