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【单选题】
已知25~29岁健康女子怀孕时间长度(从末次月经到婴儿出生)近似正态分布,现调查100名25~29岁健康女子,得到其平均怀孕时间长度均数为280天,标准差为10天,参考值的上限是99.6天,下限是260.4天,这个参考值范围最可能是()。
A.
单侧99%
B.
双侧99%
C.
双侧95%
D.
单侧95%
E.
双侧90%
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参考答案:
举一反三
【简答题】The cultures of the East and the West really distinguish each other a lot. This is because the culture systems are two systems on the whole. The of the eastern cultures is mainly from two countries: C...
【单选题】The car industry______not only the economy but also the cultures of the world.
A.
delights
B.
affects
C.
encourages
D.
raises
【单选题】额定值为1W/100Ω的碳膜电阻,在使用时电压不得超过多大数值?
A.
1V
B.
0.1V
C.
10V
D.
100V
【简答题】凡是由中国人创作出来的、符合中国音乐总体风格的音乐作品,都可以算做中国的()。
【单选题】额定值为1W/100Ω的碳膜电阻,在使用时电流不得超过多大数值?
A.
1A
B.
0.1A
C.
10mA
D.
1mA
【简答题】The cultures of the East and the West really distinguish each other a lot. This is because the culture systems are two ______ systems on the whole. The ______ of the eastern cultures is mainly from tw...
【简答题】The cultures of the East and the West really disting­uish from each other a lot.This is because the culture systems are two separate systems ____. The origin of the eastern cultures is mainly from two...
【多选题】运用波斯顿咨询公司法分析产品组合时,可以作出以下判断( )。
A.
判断企业产品组合是否理
B.
针对不同产品确定发展策略
C.
分析企业产品的走势
D.
分析强大竞争者的影响
E.
分析业务力量强弱
【判断题】The cultures of England and the United States are generally considered to be more individualist than the cultures of the Scandinavian countries.
A.
正确
B.
错误
【判断题】凡是由中国人创作出来,符合中国音乐总体风格的音乐作品,都可以称之为中国的民族音乐
A.
正确
B.
错误
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