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【单选题】
从均值为200，标准差为50的总体中抽取容量为100的简单随机样本，样本均值的数学期望是（）A.
150
B.
200
C.
100
D.
250
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【简答题】Educators in many states are afraid that the influence of Congress‘s stimulus planwould not been seen until July. 查看材料
【单选题】Most of the educators are ______ providing more freedom to the teenagers, believing that it may make them more creative and independent.
A.
in favor of
B.
in search of
C.
in charge of
D.
in need of
【单选题】Educators are seriously concerned about the high rate of dropouts between the doctor of philosophy candidates and the consequent loss of talent to a nation in need of Ph. D. s. Some have placed the dr...
A.
steps should be taken to get the dropouts back to campus
B.
the dropouts should return to a lower quality school to continue their study
C.
the Ph.D holder is generally a better adjusted person than the dropout
D.
the high dropouts rate is largely attributable to the lack of stimulation on the part of faculty members
【简答题】A．users B．learners C．students D．educators
【简答题】财政总预算会计在预算年度末向有关预算单位预拨下年度经费时，确认预算支出。( )
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