简单算数平均数是加权算数平均数的—个特例,是权数相等条件下的加权算数坪均数。()
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按照统计分组要具备完整性的原则,对婚姻状况进行调查时,应当将总体划分为未婚和已婚两个组。 ()
A. 正确
B. 错误
将某地区人均粮食产量按时间先后顺序排列,此种时间数列属于绝对数时间数列 ()
A. 正确
B. 错误
2002年,中国奥委会正式向国际奥委会推荐市作为申办年冬奥会的候选城市()
A. 哈尔滨 2008
B. 齐齐哈尔 2008
C. 哈尔滨 2010
D. 齐齐哈尔 2010
听力原文:W: Excuse me, can I take this bus to the airport?
M: No, you should take bus No. 8 over there.
Q: What can we learn from the conversation?
(2)
A. The airport is too far away.
B. The man has missed the bus.
C. This bus doesn't go to the airport.
D. There is no bus going to the airport.