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【多选题】
假设某商场顾客在单位时间内进入超市的人数服从正态分布,超市每天营业12小时。现以每十分一个时间单位对进入商场的顾客人数进行抽样调查,在某随机抽取30个时间单位,调查得到每十分钟平均进入某超市的女顾客和男顾客分别是为50.9人和21.9人,标准差分别是15.90人和5.97人。下列说法不正确的是( )。
A.
本题的是每十分钟进入商场的所有顾客，抽取的是简单随机样本
B.
本题的个体是个体是每一个顾客，采用的是整群抽样
C.
对每十分钟进入商场的女顾客和男顾客的人数之差进行点估计是 人
D.
当男女顾客相互独立时， 样本女顾客和男顾客的人数之差的标准误差 人
E.
以95%的概率保证程度，估计每十分钟进入该商场的女顾客和男顾客人数之差的置信区间近似为
F.
一进入超市的 女顾客和男顾客人数总和之差的置信区间近似为
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【单选题】某豆油经销商利用大连商品交易所期货进行卖出套期保值，卖出时基差为-30元/吨，平仓时基差为-10元/吨，则该套期保值的效果是( )(不计手续费等费用)。
A.
套期保值者不能完全对冲风险，有净亏损
B.
套期保值者可以将风险完全对冲，且有净盈利
C.
套期保值者可以实现期货市场和现货市场和盈亏完全相接
D.
由于不知道期货价格是上涨不是下跌，故无法判断
查看完整题目与答案
【简答题】阅读理解。 The common cold is the world's most widespread illness, which is plagues (疫病) that people receive. The most widespread fallacy (谬误) of all is that colds are caused by cold. They are not. They ar...
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【简答题】Attitude is one of the most important factors in determining success for all people．Successful people have one thing in common—an expectant （期待的） attitude of success．Most people begin each morning in ...
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【单选题】Among all the public holidays，National Day seems to be the most joyful to the people of the country； on that day the whole country is （ ） in a festival atmosphere．
A.
trapped
B.
sunk
C.
soaked
D.
immersed
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【多选题】新民主主义革命理论是指导中国革命取得胜利的指导思想,其理论意义在于( )。
A.
它极大地丰富了马克思主义理论
B.
有力地鼓舞和推动了世界上被压迫民族和被压迫人民反抗帝国主义、殖民主义的斗争
C.
它是从具体实际出发，对中国革命经验的概括和总结，是中国共产党集体智慧的结晶
D.
它是马克思主义中国化的重要理论成果，开辟了马克思主义中国化的发展道路
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【单选题】It can be inferred from the second paragraph that
A.
the author believes in God.
B.
most people are atheists.
C.
most American families baptize their babies.
D.
the author has a religious family background.
查看完整题目与答案
【单选题】Which is NOT true among tile following statements?
A.
Half a century ago, most people lived in the countryside.
B.
Climate changes, droughts, floods are the reasons for many people to leave their farm land.
C.
More than sixty million people are added to cities and surrounding areas every two years.
D.
The international community has reacted slowly to the growth of urban poverty.
查看完整题目与答案
【简答题】In the United States, train transportation is unpopular compared with cars and airplanes. Most people like traveling by car or by air. Officials of the United States Department of Transportation made ...
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【单选题】某大豆经销商进行卖期保值,卖出10手期货合约建仓,基差是-30元/吨,买入平仓的基差是-50元/吨,经销商在套期保值中的盈亏情况是( )。
A.
盈利2000元
B.
亏损2000元
C.
盈亏1000元
D.
亏损1000元
查看完整题目与答案
【单选题】当磁极间距为最大时,交流电磁轭的提升力至少应为:
A.
177N
B.
45N
C.
77N
D.
47N
查看完整题目与答案
相关题目：
【单选题】某豆油经销商利用大连商品交易所期货进行卖出套期保值，卖出时基差为-30元/吨，平仓时基差为-10元/吨，则该套期保值的效果是( )(不计手续费等费用)。
A.
套期保值者不能完全对冲风险，有净亏损
B.
套期保值者可以将风险完全对冲，且有净盈利
C.
套期保值者可以实现期货市场和现货市场和盈亏完全相接
D.
由于不知道期货价格是上涨不是下跌，故无法判断
查看完整题目与答案
【简答题】阅读理解。 The common cold is the world's most widespread illness, which is plagues (疫病) that people receive. The most widespread fallacy (谬误) of all is that colds are caused by cold. They are not. They ar...
查看完整题目与答案
【简答题】Attitude is one of the most important factors in determining success for all people．Successful people have one thing in common—an expectant （期待的） attitude of success．Most people begin each morning in ...
查看完整题目与答案
【单选题】Among all the public holidays，National Day seems to be the most joyful to the people of the country； on that day the whole country is （ ） in a festival atmosphere．
A.
trapped
B.
sunk
C.
soaked
D.
immersed
查看完整题目与答案
【多选题】新民主主义革命理论是指导中国革命取得胜利的指导思想,其理论意义在于( )。
A.
它极大地丰富了马克思主义理论
B.
有力地鼓舞和推动了世界上被压迫民族和被压迫人民反抗帝国主义、殖民主义的斗争
C.
它是从具体实际出发，对中国革命经验的概括和总结，是中国共产党集体智慧的结晶
D.
它是马克思主义中国化的重要理论成果，开辟了马克思主义中国化的发展道路
查看完整题目与答案
【单选题】It can be inferred from the second paragraph that
A.
the author believes in God.
B.
most people are atheists.
C.
most American families baptize their babies.
D.
the author has a religious family background.
查看完整题目与答案
【单选题】Which is NOT true among tile following statements?
A.
Half a century ago, most people lived in the countryside.
B.
Climate changes, droughts, floods are the reasons for many people to leave their farm land.
C.
More than sixty million people are added to cities and surrounding areas every two years.
D.
The international community has reacted slowly to the growth of urban poverty.
查看完整题目与答案
【简答题】In the United States, train transportation is unpopular compared with cars and airplanes. Most people like traveling by car or by air. Officials of the United States Department of Transportation made ...
查看完整题目与答案
【单选题】某大豆经销商进行卖期保值,卖出10手期货合约建仓,基差是-30元/吨,买入平仓的基差是-50元/吨,经销商在套期保值中的盈亏情况是( )。
A.
盈利2000元
B.
亏损2000元
C.
盈亏1000元
D.
亏损1000元
查看完整题目与答案
【单选题】当磁极间距为最大时,交流电磁轭的提升力至少应为:
A.
177N
B.
45N
C.
77N
D.
47N
查看完整题目与答案