【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,用样本均值估计总体均值。样本均值的数学期望是 ( ) 。
【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,用样本均值估计总体均值。样本均值的数学期望是( )
【单选题】It can be learned from the passage that Germans no longer think that ______.
A.
they will be misunderstood if they talk about the Wilhelm Gustloff tragedy.
B.
the Wilhelm Gustloff tragedy is a reasonable price to pay for the nation's past misdeeds.
C.
Germany is responsible for the horrible crimes it committed in World War II.
D.
it is wrong to equate their sufferings with those of other countries.
【单选题】It can be learned from the passage that Germans no longer think that______.
A.
they will be misunderstood if they talk about the Wilhelm Gustloff tragedy
B.
the Wilhelm Gustloff tragedy is a reasonable price to pay for the nation's past misdeeds
C.
Germany is responsible for the horrible crimes it committed in World War Ⅱ
D.
it is wrong to equate their sufferings with those of other countries
【单选题】It can be learned from the passage that Germans no longer think that ________.
A.
the Wilhelm Gustloff tragedy is a reasonable price to pay for the nation’s past misdeeds
B.
Germany is responsible for the horrible crimes it committed in World War II
C.
they will be misunderstood if they talk about the Wilhelm Gustloff tragedy
D.
it-is wrong to equate their sufferings with those of other countries
【简答题】护理质量评价包括:结构评价、 、效果评价。