单项选择题

某糖果企业为了调查糖果更换包装的效果,选取A超市为实验组,B超市为控制组,进行控制组实验组对比实验,实验时间为一个月,实验前后的月销售量数据见下表:初级经济师工商管理,历年真题,2013年初级经济师《工商管理专业知识与实务》真题该实验的试验变数效果为()箱。

A.200
B.400
C.500
D.700
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Will Hillary Be the Next American President?Back in 1969,US President Richard Nixon confidently predicted:“In the next 50 years,we shall see a woman president,perhaps sooner than you think.”Today,not too far off Nixon’s deadline,America is looking at that possibility.Over the weekend,Hillary Rodham Clinton.wife of former president Bill Clinton,announced her run for 2008 presidency.US polls indicate that Americans feel comfortable with a female president.A New York Times survey found nearly all Americans saying they would vote for president if she were qualifieD.However,accepting the theoretical notion of a female leader is quite different from voting an actual woman.In fact.there is still widespread distrust of a woman in the top position.This is partly due to the biased thinking that women are weak on national security,though they might be strong on education and health carE.This damages their prospects as a presidential contender.“There’s still an inherent nervousness on the part of voters putting a woman in as the ultimate decision—maker.Control of the army and border security are sons of traditionally male jobs,”conmented Amy Walter,an Ametican campaign analyst.“That’s where I think Voters consciously or unconsciously have difficulties with women candidates.”women have held the top job in other major Western countries.In 1979,Britain elected Margaret Thatcher prime minister.Last year,Germany made Angela Merkel its first female chancellor.In the US,no woman has succeeded in being nominated as a presidential candidatE.One woman did make the attempt:Elizabeth DolE.In 1999,she tried to get the Republican Party nomination.But Dole could only raise $5 million for her bid—compared with the $56 million George W.Bush raiseD.So Barriers lie ahead for Hillary if she wants to make history by becoming the first female US president.With the Iraqi war underway,she’ll find it even harder.“I don’t feel that our society is ready for a woman president.The enemy we face does not respect females the same way we have come to see them as equals.If we were not in this war,I would support a woman president,”sai Chris Dildy,a computer engineering student.第 22 题 Up to the present,no woman has been elected president in the US.A.RightB.WrongC.Not mentioned
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