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【单选题】
已知甲乙两个总体,甲的平均数大于乙的平均数,又知,甲.乙的标准差相等,则两个平均数的代表性( )A.
甲的平均数代表性较强
B.
乙的平均数代表性较强
C.
强弱性相等
D.
无法评价
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举一反三
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A.
are
B.
were
C.
is
D.
was
【单选题】单选题 窗体顶端 题目: 表上作业法中,供需不平衡时,需要假设1个虚拟需求市场或生产市场,虚拟市场的单位运价为 选项:
A.
横向最小值
B.
竖向最小值
C.
1
D.
0
【简答题】Student participation in the classroom is not only accepted but also expected of the student in many courses. Some professors base part of the final grade on the student’s oral participation. Although...
【简答题】胚囊内的次生核是指融合的精子和卵细胞。( )
【单选题】Many a student ______ made that mistake before, which is another way of saying a great many students ________ made that mistake.
A.
had; has
B.
has been; have
C.
have; has
D.
has; have
【简答题】Student participation (参与)in tike classroom is not only accepted but also expected of the student in many courses. Some professors base part of the final grade on the student’ s oral participation. Al...
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